Laszlo,
Yes, this was my problem, I couldn't move the drawings around in the navigator, so it would not let me change the numbering. Becoming team leader, or expanding my role in the BIM server manager, fixed this problem. Maybe this could have been better explained in the collaboration guide, that you have a pretty limited role if you are just "architect" in the server manager.
All works out fine now though, I will probably create custom roles for everyone here in the office.
Thanks Laszlo for being so responsive. Much appreciated (you too Karl and Erika!).