Are you queuing roulette or straight seize? I've noticed the few times where I've queued roulette, got a really odd, long wait timer and sat it out (or just plain forgot I queued) that it invariably sticks me into the 8 Man level 50 versions instead because some annoying person in my alliance has queued on a character under level 60. If I queue roulette now and get a bizarre estimated wait timer I just leave, requeue 30 seconds later and my queue goes back to less then 5 minutes and I've not seen the level 50 stuff since.