Hi,
We would have needed to use component to name them differently. Don't use menu item to select specific "layout" (default,flexv2 or flexv3 etc..) but choose the 1st option (default) all the time, and pick the layout through Virtuemart configuration if you want "flexv2" or "flexv3" to be default.
Refer to TUTORIAL.PDF for more info.
Regards.