For some reason VM displays child products in the parent product's category view.
For example, check out this URL:
http://www[DOT]deatschwerks[DOT]com/products/fuel-pumps
You'll notice that all of the child products of DW300, DW200 and DW65c are displayed on the "Fuel Pumps" category browse page.
I found this fix on the VM forums but it doesn't work with your template override the way it's coded:
http://forum.virtuemart.net/index.php?topic=103702
Can you provide a quick fix for this? Also, I hope you guys are making headway with the VM 2.0.12 template updates/compatibility.
The file that would need to be changed is html/com_virtuemart/category/default.php