as you add 'replacement' pilots to your sqns, the highest-exp pilots in the queue are used 1st, but not all of the available guys will be up to speed. i think that pilots 'in the queue' will train up to a certain maximum (the 35 value in your screenshot) but not beyond. also the #s in these screens don't update during the orders phase, so that 29 value in the 10-12 Exp column might be accurate when you 1st start removing pilots, but it won't update until the next turn has been executed. if you continue to take pilots out, their exp will be progressively lower.
adding pilots to TRACOM is said to help your training-queue, i've read that this is best done in groups of 10, treating IJN & IJA separately. and for IJ, be sure you're producing enough HI each month, IJ uses these points for pilot training.
best would be, don't grab any more replacement pilots for a month or 3, the guys in the queue need time to reach 35.
I think we said the same thing, but I want to be sure.
As I've alwys understood it, the guys in the "Month" brackets are still in flight school, in four cohorts. They're trainees. The near-graduates here are at an average of 29 Exp, but they won't be pulled to operating air groups unless the 345 guys in "Replacement" are all pulled first. The difference between 29 and 35 is the training gained in the time the graduated pilots wait around in Replacement before they're pulled into an operational air group.
But if the Replacement pool has no withdrawls, but keeps having 29 rated guys dumping in at the other end, over time the Replacement EXP average will drop. And from the number in training months 10-12 (1018 individuals) versus the number in the Replacement pool (345) the average will drop a fair bit.