Category problem with products

[GHAS]

Hello,

I have a problem with products in categories. Few of my products are same on each page. I have on example red T-shirt on page number 1 and on page number 2 this T-shirt is displaying too.
Problem is in virtuemart, not in template, because i try set a default joomla template and problem still persist.

Know anybody where is problem?

[GHAS]

OK, I will solved my problem. I will set up default product ordering by product name and it works.