I came in second in a game. You can see it in the past games list when you go to the map. Yet on the rankings screen it says I came in 4th. And the false winners have the medals reflected on their profile. Is this a glitch or was there some kind of override? Frustrating, although it wasn't a ranked game.

I suggest emailing this topic to the devs (contact@subterfuge-game.com). Response may be a bit slower with the holidays coming up and one of them being on vacation, but I don't see a valid in-game reason to explain this.
The devs can look into it and probably fix the medal distribution.