updated - help needed - now only 1 product per page (category) showing

[Lexiboy]

on Joomla 2.5.4 and VM 2.04

I have a problem that VM now only wants to show 1 product per category page.

I do not manage to change this in the configuration screen -> templates and/or Shopfront.

After some testing it seems that the problem does not occur in IE, but does in FF, Chrome and safari, AFTER a refresh. So initialy you get 12 items, after refresh only 1 per page.

Can anyone check if they get the same problem?  Does anyone have any suggestions?

http://www.lemongrasshouse.ru/%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%BD%D0%B5%D1%82-%D0%BC%D0%B0%D0%B3%D0%B0%D0%B7%D0%B8%D0%BD/by-product/hair/shampoos