I've run into a bug where my money goes massively negative, I've seen it elsewhere on the forum. Seems to be related to full squadrons of air units. 

Seemingly some air squadrons are costing a massive amount of money while some are actually paying me?

Seems as though the issue may be related to full squads of 8 units, as the squad with 7 is fine.

Deleting a single unit in all full squads resolved the issue.

I'm also not sure why it's charging me for number of territories in my sphere of influence. The same fix as above also corrected this issue.

Japanese Turn 268.ctr

auto-save 598.ctr

These are the most recent saves I have before and after the bug occured.