Achievements not unlocking for Infection and Headhunter?

So yesterday I was the last human alive in an Infection game, got the medal for last man standing, but no achievement. Friend got the same thing the following round and got the achievement.

Then later playing Headhunter I captured 10 skulls at once and nothing???

Was the game of Infection on a Defiant map?

Also, FFA Headhunter is the only gametype in Matchmaking which has Skullamanjaro’s enabled, I assume you got it in Multi-Team, it also needs to be on an Anniversary map I believe.

Ahh thanks man. Infection was on “Spooky Base” but my friend got the cheev in the same game so I’m assuming something is simply wrong with it.

Headhunter was multi-team yes. Damn…