HI @lashac
Yes, this may be a problem. It shouldn’t be an issue to have two different forms on the same page or the same form on multiple pages but if it’s the very same form on the very same page then clicking “submit” button may affect both these forms in some cases.
Normally, it wouldn’t be a problem but if these forms are loaded in some sort of popups or otherwise “dynamic” content it’s quite likely that it affects how forms JS works, thus resulting in the issue.
So while I cannot confirm that for sure, it’s definitely worth checking and the simplest way would be to just temporarily remove one of the form copies from the page. If after that submissions are no longer duplicated – it would be confirmation.
If yes, then best way to deal with it would be to either use two separate forms or have just one form in one popup and use two separate buttons to open the very same popup (instead of two separate popups with the same form).
If it’s not the case though, we’ll look into it further.
Best regards,
Adam