Copy Page and Paste in Place in new page

I agree. Try just duplicating the page instead of the items on the page. I'm guessing you might be getting the duplicates from some of the objects being nested in other objects.

Since posting this I found a few resources to help me get nearly all the way there. However when I duplicate (paste) the copied page, some of the objects are pasted 2-3 times so I have multiple overlapping. Didn't notice it at first until I went to edit a Text Box and saw the same placeholder text box still there.

// Adobe InDesign Script

// Function to copy contents from specified page to a specified page
function copyContentsToPage() {
    var doc = app.activeDocument;

    // Prompt the user for the source and destination page numbers
    var sourcePageNumber = prompt("How many products on this page?", "", "Copy Contents");
    var destinationPageNumber = prompt("Enter the page number to create template on:", "", "Paste Contents");
    var destinationPageSide = prompt("Which side of the page is this on?\n\n" + "1. Left side\n" + "2. Right side",
                        "",
                        "Choose New Page Side"
                    );
                        


    // Check if the source and destination page numbers are valid
    if (
        sourcePageNumber !== null &&
        destinationPageNumber !== null &&
        !isNaN(sourcePageNumber) &&
        !isNaN(destinationPageNumber)
    ) {
        sourcePageNumber = parseInt(sourcePageNumber);
        destinationPageNumber = parseInt(destinationPageNumber);

        if (
            sourcePageNumber > 0 &&
            sourcePageNumber <= doc.pages.length &&
            destinationPageNumber > 0 &&
            destinationPageNumber <= doc.pages.length
        ) {
	    if (destinationPageSide == 2) {
            var sourcePage = doc.pages[sourcePageNumber + 456];
            var destinationPage = doc.pages[destinationPageNumber - 1];
		} else {
		var sourcePage = doc.pages[sourcePageNumber + 448];
            	var destinationPage = doc.pages[destinationPageNumber - 1];
	    }
            // Duplicate the items from the source page to the destination page
            var itemsToCopy = sourcePage.allPageItems;
            for (var i = 0; i < itemsToCopy.length; i++) {
                var duplicatedItem = itemsToCopy[i].duplicate(destinationPage);
            }

            alert(
                sourcePageNumber + " contents created successfully" +
                    " on page " +
                    destinationPageNumber +
                    "."
            );
        } else {
            alert("Invalid source or destination page number. Please provide valid page numbers.");
        }
    } else {
        alert("Invalid input. Please enter valid page numbers.");
    }
}

// Call the function
copyContentsToPage();