well its still not clear all you did to point us to what you could have done wrong although it looks to me this would be related to you and your new install something you did not do correct.
If you sent us ftp and phpmyadmin info to look things over we can take a quick peek to
support@photopost.com
You did not by chance use vbulletin's impex script to move your forum as this would explain why your profiles do not match up
As far as users being logged in or what not most likely something off on your reinstall. Did you set permissions do all the usergroups exist under edit usergroups in admin?