JoomSEF seems to work fine to me, however Virtuemart???

Only one webshop goes correct out of 7 intallations untill now.

Are there more problems that a Joomla main menu knob is shown in the url... and that the cart goes wrong froms tep 1 to 2 and from 2 to 1 so... doesn't work like it should be in 3 shops. Why the urls are SEF urls of the cart in these 3 websites...?

Anyone has the same problem with an extra word into the url after the domainname, example:

main category: www.speelkleden.nl/home/speelkleed (home doesn't belong there when hitting the VM menu items)
subcategory: www.speelkleden.nl/contact/...... (in my opinion something goes wrong, but what?)

Are there more people with these kind of problems?