Sorry, I stand corrected. 8/28 was the first of many. I believe they skipped a week and the second class is going to be 9/10 (even though it actually starts on the 11th).

I don't believe there is a seat lock. My friend who was in January class in 737 starts 757 training on Oct 1st. The way they run their bids only twice a year...its almost like being locked for a year. I think you need to be line qualified to participate in vacancy bid. For example, the class that started 8/28...I don't know if they are included in the vacancy bid that is open right now. The next bid won't be for another 6 months or so.