items in shopping cart dublicated. problem

[maxus]

I see that problem in version 1.2.6 and make apgrade to 1.3.7

Now I see same problem

go to my shop
http://shop.skyhorse.cz
try to search dx3850

you can see many models of cartridges

Try to add to shoping cart any model (button "do kosiku")
return back (button "zpet k nakupu")
and add any other cartridge

When Im make it - I can not to add another item.. Just see changed quantity of first added item

Damn. .. yesterday customer call me and tell me about this problem. Hi use IE
Im use Mozilla Firefox and got same problem

Im use SEO mode.. meibe it is problem?
I need your help.

[maxus]

damn... anybody help me

Im ask it whenI have 1.2.6 and question be ignored
ok

But now it is really problem... they exist for me and for my customers

[Ajeh]

Do a click for click on URLs as I can add whatever I want to the cart ...