@Wicorel I'm not sure if I can be of any assistance, but I'll help however I can.

Definite weirdness happening. I spent hours last night trying to track it down; there's more problems than just the aiming weirdly in 155.

@Wicorel Upon further investigation, it appears that the ship in that save did in fact have greater upward thrust than forward thrust; however, adjusting the number of thrusters such that forward had the greatest thrust did not resolve the issue.

@Wicorel Hmmm. Well, in the ship I was using in this save, 'best' thrust is definitely forward, so it doesn't seem like it could be an issue of thruster configuration.

I'm seeing the problem. First thoughts is that it's 'aiming' with the bottom and not 'forward'. This is likely because there's the 'best' thrust in a weird direction or it's being calculated wrong..