Issues with plugin

Hello,

I have some problems. First, the results of a filter are incorrect. For example, if i choose the size 39, the results there are not only No 39. There are variety of 36, 37 etc. If I choose the first product of results, I see that the availability is on No 37 and 38 for example, there is not No 39.

And the other problem is that I make a search by filtering and the results are for example 30, so there are 3 pages because I have 12 products per page. But there is one more line with pagination with more pages (products) because there are all products. Why?

The page I need help with: [log in to see the link]