Mirror game not ending and going into negative turns?

[pontaeus]

Anyone have an issue with a game not resolving on the specified turn and going into negative turns? I have a large meeting engagement scenario that was 45 turns long and did not conclude on turn 90. It is a mirror game and the other version of it did not have such an issue. The mirror of this game concluded on turn 45.
The last turn included a weird glitch where two of my AFVs seemed to merge together in the same space as well. It may not be related. 
Thanks for any insights. 
Pont