PS 1.5.2 Block Cart Products copy after login

[m3442a]

Hello,

 

i have a problem on chekout with my Site:

 

i added a product to the blockcart (AJAX on, right column ). than i going to chekout (1-Page Chekout). In this time everything is ok. But if i take a login, the system give my a invoice and delivery adress, and the same time put the Block Cart module a copy from the product(s) inside the Cart Module ( see attachement ). After that i agree TOS and select my payment and on the next site (payment execution site) is everything fine, the product copy is gone and the cart summary is also right.

 

I try the standard and many other themes, but always the same. If i switch the ajax on the cart block to "off", everything is ok, no copy of products.

 

Have everyone a idea whats happening on the cart module? Maybe a wrong ajax file?

i also try to new install the blockcart module, but the same effect.

 

PS 1.5.2

 

Thanks ahead