diff --git a/src/actions/base-actions.js b/src/actions/base-actions.js
index 9e1640563..36416379b 100644
--- a/src/actions/base-actions.js
+++ b/src/actions/base-actions.js
@@ -52,6 +52,12 @@ export const snackbarSuccessHandler = (message) => (dispatch, state) =>
     state
   );
 
+export const snackbarWarningHandler = (message) => (dispatch, state) =>
+  setSnackbarMessage({ ...message, type: "warning", code: CODE_200 })(
+    dispatch,
+    state
+  );
+
 export const snackbarErrorMsg = (message) => (dispatch, state) =>
   setSnackbarMessage({ ...message, type: "error", code: CODE_200 })(
     dispatch,
diff --git a/src/actions/sponsor-pages-actions.js b/src/actions/sponsor-pages-actions.js
index 7ce4ec5ba..00d6e1230 100644
--- a/src/actions/sponsor-pages-actions.js
+++ b/src/actions/sponsor-pages-actions.js
@@ -27,7 +27,11 @@ import {
   getAccessTokenSafely,
   normalizeSelectAllField
 } from "../utils/methods";
-import { snackbarErrorHandler, snackbarSuccessHandler } from "./base-actions";
+import {
+  snackbarErrorHandler,
+  snackbarSuccessHandler,
+  snackbarWarningHandler
+} from "./base-actions";
 import {
   DEFAULT_CURRENT_PAGE,
   DEFAULT_ORDER_DIR,
@@ -228,26 +232,46 @@ export const saveSponsorManagedPage =
         });
     }
 
-    const normalizedEntity = normalizeSponsorManagedPage(entity);
+    const selectedPageIds = entity.pages ?? [];
+    const { managedPages } = getState().sponsorState;
+    const existingPageIds = new Set(managedPages.pages?.map((p) => p.id) ?? []);
+    const newPageIds = selectedPageIds.filter((id) => !existingPageIds.has(id));
+    const alreadyCount = selectedPageIds.length - newPageIds.length;
+    const successTitle = T.translate("general.success");
+
+    if (selectedPageIds.length && !newPageIds.length) {
+      dispatch(
+        snackbarWarningHandler({
+          title: successTitle,
+          html: T.translate(
+            "edit_sponsor.pages_tab.managed_page_already_added",
+            { alreadyCount }
+          )
+        })
+      );
+      dispatch(stopLoading());
+      return { skipped: true, reason: "already-added" };
+    }
+
+    const html =
+      alreadyCount > 0
+        ? T.translate("edit_sponsor.pages_tab.managed_page_partially_added", {
+            addedCount: newPageIds.length,
+            alreadyCount
+          })
+        : T.translate("edit_sponsor.pages_tab.managed_page_created");
 
     return postRequest(
       null,
       createAction(SPONSOR_MANAGED_PAGE_ADDED),
       `${window.SPONSOR_PAGES_API_URL}/api/v1/summits/${currentSummit.id}/sponsors/${sponsorId}/managed-pages`,
-      normalizedEntity,
+      normalizeSponsorManagedPage({ ...entity, pages: newPageIds }),
       snackbarErrorHandler
     )(params)(dispatch)
-      .then(() => {
-        dispatch(
-          snackbarSuccessHandler({
-            title: T.translate("general.success"),
-            html: T.translate("edit_sponsor.pages_tab.managed_page_created")
-          })
-        );
-      })
-      .finally(() => {
-        dispatch(stopLoading());
-      });
+      .then(() =>
+        dispatch(snackbarSuccessHandler({ title: successTitle, html }))
+      )
+      .finally(() => dispatch(stopLoading()));
   };
 
 export const deleteSponsorManagedPage =
diff --git a/src/i18n/en.json b/src/i18n/en.json
index f5a408eb3..f9c506668 100644
--- a/src/i18n/en.json
+++ b/src/i18n/en.json
@@ -2548,6 +2548,8 @@
       "custom_page_created": "Custom Sponsor Page created successfully",
       "managed_page_saved": "Sponsor Managed Page saved successfully",
       "managed_page_created": "Sponsor Managed Page created successfully",
+      "managed_page_already_added": "Selected page(s) have already been added ({alreadyCount}).",
+      "managed_page_partially_added": "Added {addedCount} page(s). {alreadyCount} page(s) were already added.",
       "page_delete_warning": "Please verify you want to delete {page}"
     },
     "cart_tab": {
diff --git a/src/pages/sponsors/sponsor-page/tabs/sponsor-pages-tab/__tests__/sponsor-pages-tab.test.js b/src/pages/sponsors/sponsor-page/tabs/sponsor-pages-tab/__tests__/sponsor-pages-tab.test.js
index 8390173b8..36b8a1f46 100644
--- a/src/pages/sponsors/sponsor-page/tabs/sponsor-pages-tab/__tests__/sponsor-pages-tab.test.js
+++ b/src/pages/sponsors/sponsor-page/tabs/sponsor-pages-tab/__tests__/sponsor-pages-tab.test.js
@@ -23,9 +23,12 @@ jest.mock(
       return (
         <div data-testid="add-sponsor-page-template-popup">
           <button onClick={onClose}>Close</button>
-          <button onClick={() => onSubmit({ id: 1, name: "Test" })}>
+          <button onClick={() => onSubmit({ pages: [1], add_ons: [] })}>
             Submit
           </button>
+          <button onClick={() => onSubmit({ pages: [1, 2], add_ons: [] })}>
+            Submit Mixed
+          </button>
         </div>
       );
     }
@@ -370,6 +373,98 @@ describe("SponsorPagesTab", () => {
         screen.queryByTestId("page-template-popup")
       ).not.toBeInTheDocument();
     });
+
+    it("should send template selection to action for duplicate managed pages", async () => {
+      renderWithRedux(
+        <SponsorPagesTab
+          sponsor={createSponsor()}
+          summitId={1}
+          summitTZ="UTC"
+        />,
+        {
+          initialState: {
+            ...defaultState,
+            sponsorPagePagesListState: {
+              ...defaultState.sponsorPagePagesListState,
+              managedPages: {
+                ...defaultState.sponsorPagePagesListState.managedPages,
+                pages: [createManagedPage(1)],
+                totalItems: 1
+              }
+            }
+          }
+        }
+      );
+
+      const usingTemplateButton = screen.getByText(
+        "edit_sponsor.pages_tab.using_template"
+      );
+
+      await act(async () => {
+        await userEvent.click(usingTemplateButton);
+      });
+
+      expect(
+        screen.getByTestId("add-sponsor-page-template-popup")
+      ).toBeInTheDocument();
+
+      const submitButton = screen.getByText("Submit");
+      await act(async () => {
+        await userEvent.click(submitButton);
+      });
+
+      expect(saveSponsorManagedPage).toHaveBeenCalledWith({
+        pages: [1],
+        add_ons: []
+      });
+      expect(
+        screen.queryByTestId("add-sponsor-page-template-popup")
+      ).not.toBeInTheDocument();
+    });
+
+    it("should send mixed template selection to action", async () => {
+      renderWithRedux(
+        <SponsorPagesTab
+          sponsor={createSponsor()}
+          summitId={1}
+          summitTZ="UTC"
+        />,
+        {
+          initialState: {
+            ...defaultState,
+            sponsorPagePagesListState: {
+              ...defaultState.sponsorPagePagesListState,
+              managedPages: {
+                ...defaultState.sponsorPagePagesListState.managedPages,
+                pages: [createManagedPage(1)],
+                totalItems: 1
+              }
+            }
+          }
+        }
+      );
+
+      const usingTemplateButton = screen.getByText(
+        "edit_sponsor.pages_tab.using_template"
+      );
+
+      await act(async () => {
+        await userEvent.click(usingTemplateButton);
+      });
+
+      const submitMixedButton = screen.getByText("Submit Mixed");
+      await act(async () => {
+        await userEvent.click(submitMixedButton);
+      });
+
+      expect(saveSponsorManagedPage).toHaveBeenCalledWith({
+        pages: [1, 2],
+        add_ons: []
+      });
+      expect(
+        screen.queryByTestId("add-sponsor-page-template-popup")
+      ).not.toBeInTheDocument();
+    });
   });
 
   it("should call archiveCustomizedPage for non-archived item", async () => {