Contract Coin failed to track a contract

The strange PDA tracks sentry kills, health dispensed (for dispensers), and allies teleported (for teleporters). However, only the sentry kills go toward the strange rank (the name changes). I believe that allies teleported pertains only toward allies and not enemy spies, as illustrated by other uses of the word "ally" in other in item descriptions. The name changes are like the normal ones. http://wiki.teamfortress.com/wiki/Strange#Ranks http://wiki.teamfortress.com/wiki/PDA

The Strange wrench tracks both Kills with wrench and Sentry Kills. But, the item itself is only effected by Kills with the weapon, and the Sentry Kills are just tracked underneath it, much like Stange mediguns (not Kritzkreig) with their UberCharge being the main counter, and assists being the secondary counter.

Moving on, you would need the strange part: Robots Killed on a weapon, but it tracks kills with the weapon, not something it creates (like a sentry gun), as it would track only Melee kills. And, seeing that the PDA can not get any strange parts on it, there is no way to track sentry kills on MVM robots.

NOTE: If you are you using the Strange Gunslinger, it counts Sentry Kills as its main, then Melee Kills as its secondary.