Since 2 weeks ago, every time I manually add any Distribution Profiles (Ad-Hoc or AppStore Profiles) to Xcode, they vanish from the Organizer in a matter of minutes, or when I press the Refresh button (the one next to "Automatic Device Provisioning" in Organizer).
How do I solve this problem?
(note that I've already tried to start fresh without success: cleaning KeyChain Access, revoking certificates, deleting profiles, and do it all step by step since the beginning)