Regarding your shout at aao25.com: no, they don't have to pay to SourceForge, open source projects are hosted there for free. But... assist is not open source project, so it's another area where they are, excuse me, shady :-)
hmm well if you can see everyone fine then it might just be my end (but if i remember correctly admins can always see every channel regardless on if its set to not show them) i dont have mobile app as they dont make TS3 for windows phone (cuz their assholes )
Also, if your useing mobile version, you have you press on the eyeball in order to see everyone in channels. Had that same problem once untill Nick helped me figure it out.