Shared Libraries, batch edit mode Shopperpress

Using Shopperpress and the developer of cart said the problem is with the backend “batch edit” is a WP issue.

It will not let me manage my products in batch edit, but it will in a singular “quick edit”. My shopperpress site is setup as Amazon Affiliate. I have 10,000 products I want to add, I am at 4000.

I need to batch move some items from one category to another, and in batch edit, it will not show a tick mark in the category I am in but will allow me to tick the box of where I want the product to go. When I save, I now have product in 2 categories, 1 is wrong one and one is right one.

I have tried firefox and chrome, same issues.

Shopperpress developer said it is a WP backend problem. So what do I do, I cannot manually quick edit 1 item at a time to place in correct category. It will take forever.

Quick edit, however gives me tick mark in the current category allows me to remove it, and place tick mark in correct category. Regular edit works fine too, its the batch that is broken.

My theme developer tested my problem and found the same problem I did.