Nothing out of the ordinary here. Nothing special was going on. Just building fleet and desync.
update: Desync appears on every loaded save now the second the game loads.
Attaching this save
Ok, I just tested both saves attached to your post, with two copies of the game connected in multiplayer, and neither saves generates desyncs immediately upon load (or after being run for a while). I tried having both copies of the game use the same logging settings, and also tried having each use different ones (one having advanced-logging on and reinforcement-logging off, and the other the other way around). I tried running at normal speeds and at +!!! (which doesn't really help in MP anyway, may as well change that to imitate +9) speed and +2 network.
Sorry, I just can't get these to happen, so I'd definitely be shooting in the dark to try to fix them.
To clarify, can you try:
1) Load one of the saves attached to the first post in this thread.
2) Right after loading, before the other player connects, what does the game timer in the upper left corner of the screen say?
3) After the other player connects, do you get a desync?
4) If you get a desync, what does the game timer in the upper left corner of the screen say then?
Thanks