The posting called for 16 upgrades and the award only had 13 people. They had to cancel and re-issue the posting a week later because they needed to wait that one week to get at least 5 more people from the Nov 10 class through IOE and qualfied to start class. Some guys finished IOE less than a week before the upgrade class date. They may not be short of captains right now, but there's definitely a lack of qualified or willing people to go right now which will lead to a shortage very quickly. That's why they are taking prior 121 people from the December and January classes and expediting their IOE to keep the upgrade classes as full as possible.