I don't understand some people

 I'm dealing with a couple in a military-related organization who seem to take delight into complicating things.  Who can't seem to keep a straight story when they argue  And who quite frankly are a pain in my ass right now.  The only thing keeping me from uncorking on them is the fact that in seven months, I'll never have to talk to them again.

I don't understand people like that.  I don't know what drives them.  I don't know what motivates them.  All I can do is try to avoid dealing with them until I leave, and then quite frankly they can go be someone else's problem.