Yeah, I'm not sure I completely understand the holdback pay language in the contract. Sounds like the latest it should start is 120 days after the initial class date. Not sure what the 1-for-1 bit means. It used to be that hold backs would only start getting holdback protection when someone junior to them started class.
They may be using Captains to fly right seat to fill in for the shortage of FOs and then running out of Captains? I don't know. I do know they have been running Captains through AQP before most of the FOs since they would otherwise need a 6 month PC/PT. That will have to change starting in May because the FOs will start to be due for a PC/PT. That will pull FOs offline for 3-4 days at a time, creating even more of a crunch.