Add me to the list of those who had to leave and rejoin. It also seems that those who do so are all returning as deep purple speckles. Not complaining as I'm happy with that but it does seem to be odd.
I can answer why you are all coming back as Deep Purple cause I'm a group admin for another one. When you join it always pops you into the last member type listed, so that's probably the last one on the list. I'm sure when sc803 wakes up, she can sort things. Actually, I wonder if this is a bug or if she was playing with settings and somehow removed our permissions...
I'm going to link this to the Bugs forums, which is probably where we need to put it :)