Gbremset, thanks for the detailed description (and your donation ).

First thing I would do is disable all the other addons except Jamba and take your toons for a run through a few quests and see if the problems occur.

Also, try waiting after you make the first selection (up to 1 minute*) before you click accept to see if the toons that were failing actually catch up. It could be that the addon channel is slow.

Also make sure you push the quest and team settings from your master to all your other toons to make sure they all have the same settings (the settings need to be identical for Jamba to function correctly).

Also note that recently, Blizzard changed the low level quests to auto-accept (nothing to do with Jamba).

* Obviously waiting this long is not an option, but let's try and find out whats going on.