I'm setting up VirtueMart 1.1.0 RC2 and adding User Fields. It doesn't let me use underscores or numbers in the name, so I can't add vm_child_1, vm_child_2, ... I had to use vm_childone, vm_childtwo, etc. Is the ban on numbers and underscores necessary?
Once added, they all get an ordering of 0 (zero). The reorder arrows didn't move the User Fields down when clicked. Entering new order numbers and clicking on the Save icon for the ordering column DID work properly, however.