A few odd issues with Avantfax 3.3.4

Hi guys,
I've just recently installed Avantfax 3.3.4 in combination with Hylafax, and am having a few issues that I can't seem to get past:
1) It appears that when I try to add a user that does not need admin or super user rights, upon creation, they're just not able to login. If I give them admin or super user rights, they are then able to login. This seems to be present for me in 3.3.3 as well.
2) It doesn't appear to me that there's a clear way to limit users from seeing other users on the system. I'm wanting to disable some users from seeing some things (beyond just their own modems assigned to them) - for example, users that are not admins or super users should not be able to see the whole user list 

3) I'm assuming that users can only see their own contacts when sending faxes, and other users won't have that information exposed to them - but can't really find a clear answer on that
Hoping some folks can share their thoughts on these issues that I'm stumbling with. I know this is the Hylafax mailing list, but noticed Avantfax being mentioned here on and off, figured it was worth a shot.
Thanks,
Andy