Filter showing wrong products

Hi

There seems to be an error when I apply filter to products where it shows up different ones.

For example I have filters on site showing 1GB, 4GB, 8GB, 100GB etc. But when applying the 100GB filter it will show 1GB products and not 100GB. If I apply 8GB filter, it will show 4GB products etc.

I’m wondering if you have a solution or advice for this? We are using this plugin in conjunction with the barn2plugins product table and would like to have this issue fixed before we purchase the pro filter from you.

Thanks for your time.