When I had it just set on my iphone and laptop - there was no duplication. Now that I have it on my ipad too every time I open it on my iphone and than the next day open on my computer - the whole file is duplicated. Sometimes I don’t even have to open the file, it just does it.
I just did a test and when when I wrote text on the page and than synced it over, it said about indexing.
It put the text on the page I already had and created another page with (1) after it.