Installation Help from Autodesk is at this forum (looks like they moved you here already while I was typing this email):
http://forums.autodesk.com/t5/Installation-Licensing/bd-p/24
If you use REVIT, you probably also purchased a subscription. Visit the Subscription Page for direct contact. Someone somewhere sent you that information if you did purchase a subscription:
http://www.autodesk.com/subscriptionlogin
You can also use this site to get a new authorization number if, as you note, the other installations were mistakes:
http://usa.autodesk.com/adsk/servlet/pc/item?id=18424632&siteID=123112
Call Autodesk Product Registration and Authorization (during normal business hours for each region):
http://usa.autodesk.com/support/installation/
1-800-551-1490 > Option 1 (English) > Option 1 > (Stand-alone)
Asia / Pacific: 65.6735.5688
Europe / Middle East / Asia: 41.32.723.9595
Thanks Dean!
Joshua, please send me a Private Message (click on my philip.s profile name and then "Send this user a private message") with the relevant licensing info if you're unable to resolve this issue with our License Assistance team (referenced above) and I'll gladly assist!