Shoulden’t your phase get saved on logout, thus making it possible to log back into the same phase? Just a suggestion. /emoticons/default_smile.png
I may be wrong, but phases are usually set by quests and events. With either of those active (or completed, as the case may be), the phase should be set accordingly at login. If that isn’t the process currently in place, that would be the bug, not that phases aren’t being saved.
Then it must be bugged, I have a few quests that change your phase, however when logging out and back in, your in the default phase.
It is not bugged, phase changes are handled via spells, any other method is not Blizzlike and hence not supported.