Marketpress Categories Not working Properly

I'm having some serious issues with Marketpress Product Categories not functioning correctly. All of the slugs are the same for all of my shops. Some products do not show up in the correct categories. I've attempted deleting categories and renaming the slugs, I've cleared the cache and cookies, I've restarted the shops. I have no clue what is going on. They work for one second and not the next.

Please advise. I will send in my information for you to login to super admin and see, that everything is correct. I have no clue what is going on... who is good at categories?