well it don't look abnormal, but i don't play the IJ.
but what you've got is a fixed # of pilots entering each branch of service, every month on the 1st day of the month. The # of pilots is fixed in the scenario design. Unlike the Allies, IJ must pay HI points for the entering pilots, so an IJ player must account for this when planning his industry & production.
these guys are 'trainee' pilots, think of them as living in various training bases around your territory, except they can't be attacked & never wash out due to incompetence. over time they ascend thru each of the 4 3-month training levels, gaining EXP and a very low amount of skill training. once they've completed the last phase of school, they 'graduate' to become 'replacement' pilots, which you can pull into your various on-map sqns. of course they'll then need lots of add'l training to become competent in various skills, before they'll be useful as anything other than food for enemy aces.
there's really nothing you can do to alter this 2-month process, so it's pretty much useless information that you don't need to worry about, except that you don't want to draw more than 100% of your replacement pilots into sqns, 'cos i think you'll start to dip into the trainees, & (if you're playing IJ) you MUST have enough HI points available in your industry pool on the last day of each month to cover the cost of new trainees, else the flow of replacement pilots will dip a year later & you'll be sad.
each nation/branch has a pre-set EXP # that graduating trainees are supposed to attain, for IJN it's 50(?), for IJA it's 40(?)(iirc). EXP #s for the Allies are generally lower. better check the manual for the true #s. anyway, many/most of your replacement pilots won't have quite that much EXP, a very few might have more. i wouldn't worry about the diff in IJN/IJA EXP in the middle classes, it might just be statistical noise. it's entirely normal that IJA pilots will graduate w/ ~10 less EXP than their IJA counterparts, so don't be thinking that your IJA guys are suffering.
anyhow that's my basic understanding of the system, but my knowledge is only partial. others might chime in here if what i've told you is wrong.
another thing or 3 about TRACOM - another while-back post i read here stated that TRACOM's action on trainees included a 'chance' that trainee EXP would increase, but forumeer Alfred (who never posts anything that's not 100% reliable) stomped on that notion (more than once). TRACOM *is* useful for speeding some trainees thru their schooling, & is also useful as a reserve - the IJ might be able to stockpile some 100's of master-blaster pilots during the course of the war, and unleash them to their best-equipped sqns in late '44 as part of a last-ditch defensive plan when training newbs won't really matter any more.
< Message edited by jmalter -- 12/2/2012 6:48:16 AM >