Also your going to have user ownership issues no matter what here. I looked at your site in our license records.
Not only did you import a coppermine into a photopost where you had no user records in coppermine you also switched smf to vbulletin.
You most definately have to run this script Reassign userid's when switching integrations to VBulletin
Basically when you import your smf users into vbulletin using the vbulletin impex importers it will change all your userid's. Thus you need to run this other script I meantion to grab and update the users userid based on there username. Now as long as the usernames are correct on the photos and comments you should get everything sorted. As noted it all depends on the quality of data on import. I cant say how coppermine performs when its bridged with another app like SMF.