Unlike the AvA, there appears to be a side-switch time restriction in SE2. I logged on a bit after 9:00; at that hour, sides were 4 v 2. I was on the 4 side, so I switched. Someone must have seen me; in that short time everyone but Shane promptly left. (Hey, it's happened all my life.) But Shane and I were on the same side, so I tried to switch back. The timer prevented me from doing that for 0.05 hours, which I guess is about three minutes. That exceeded my attention span, and I figured Shane would want to have a greater challenge anyway, so I moved out of the arena.
Anyway, I don't know if there's a setting that will let you change this, but thought you'd like to know.
- oldman