Did you do all the main quests up to act 3?
Cos' I tryed that too, played online, and someone updated af quest in act 2 when i was lvl 3 in act 1.. So that destroyed all my main quests, and destroyed my new char.
So, go check you have done all your main quests. If you have, then i quess you can live without the third bag. You can just use the portal stone if it's really importanté.
