The only official errata that I know of is that taken from the official site long ago regarding the base game - nothing at all for any of the later books. It's funny too that one of the few pieces of errata offered says that front turret planes aren't allowed, and what do they do in the Aircraft Manual but turn around and give us two of them.
I wouldn't allow any other planes with a 360 turret either. They have no real construction rules for it, but worse is how nebulous the 360 rules are anyway. Better to just avoid the whole mess unless someone is playing the actual Monitor.
I'd never examined the armor too closely on my own cadet printouts of the Mako and Monitor record sheets, but, now that you mention it, mine are apparently shorted rows of armor too. It's kind of irritating that a few months back I went and printed a whole bunch of extra sheets of all the various fighters so my group would have them whenever we need them, and somehow I never noticed the mistake. Ugh!! Cadet seems to have cut all my planes'' tail armor off at 60.
I'd probably never even have noticed if not for your post since I've not used any of those particular planes.
"My footsteps have often been marked with blood." Daniel Boone, 1734-1820.