I've noticed a couple of inconsistencies in the Leaderboard scoring for Damage Done and Aliens Destroyed.
1. If I start a map and quit before it ends, no damage is added to Overall Damage Done (ODD). This makes sense except I still get credit for the aliens I killed in Overall Aliens Destroyed. I would expect 0 credit in both cases.
2. At the end of playing a map, one of the statistics displayed is how much damage I did. When I look on the Leaderboard my ODD is not equal to my previous ODD + the damage for the map I just played. It consistently adds less than the game said I just dealt.