Tags not unlocking - and well passed their requirements.

Just decided to go over my HighLight Reel awards - I noticed 4 are locked when in reality I have FAR surpassed their requirement.

They are the:
25 Bouncer Kills
25 Scrambler Kills
100 Blackjack Kills
100 Slim Kills

I am over 1000 on all of them except Scramblers and Bouncers.
so as to why these are not unlocked I have no idea. My only guess is a match to where I would of unlocked them disconnected at matches end or during.

I believe you need to accomplish these within a single game. So although you may have killed thousands of Slims, you have not killed 100 in a single match.

Only the Bouncer one seems a bit unrealistic.

IF you want the bouncer tag just go for the scramble blitz solo (that's the 10 round one right?). You'll kill well over 25 bouncers if you complete it by yourself.

The only one I am missing is the 100 slims in one game tag. I thought it wasn't possible to get it from a crossfire match, but one of my friends told me how he got it (he just killed slims at the enemy's door until they stopped spawning).

Ah looks like it could be that. I play this game in Crossfire non-stop (ranked 118th as of today), however once I got all the unlockables from Blitz mode (Iron Man and other tags, the Achievements) I never really bothered to play it again much.
Looks like it's Blitz mode as support. The 25 Bouncers will likely take a few tries as their numbers are always low.

All the highlight protags require single-game stats. That way, they can show how many times you've achieved something.

The career protags take your overall stats into account