Field sets dont asign to selected product

I created field sets for a few different products and assigned each one to a single different product using “assign this field sets to>choose products>(1 chosen product)”.

But when I check it with cleared cache all field sets are assigned to all the products assigned and some of them have additional fields which are not supposed to be there.

For example, in 2 products I want to have length A and length B. In the third product i just want length A and I assigned it correctly, but length B still shows for this third product.

There are a lot of lengths and rules and I use Price-Addons for it. I duplicated second and third field sets and adjusted them.

Help would be really appreciated.

Best,
Jacob