The max teams you can have is 20 which is what its set at. Though there are some spots open right now, so I would try joining again.
There was an issue with the draft, so it didnt happen today. The league needs an even number of teams before the draft starts (which we had, it was full), but then some asses decided to drop their team minutes before the draft was to start. Which caused Yahoo to automatically switch the league to auto-draft. When I noticed this I tried to switch it back but it made me pick a new date/time, I picked a new one, got some hate mail, picked another date/time and I think we are ok now.
I apologize for the problems with the draft, but I had no control over the people dropping or yahoo changing the draft type. It was a giant pain in the ass, but we are going to try again tomorrow and hopefully things will work out and we can have a great season.