Burn, Baby, Burn! achievement not happening.

[Hawk Zombie]

Am I doing something wrong? I've killed about 10 enemies now with the torch, and the achievement still has not popped for me. I'm using the Ch. 2 area with two torch holders and stealth killing one, using his torch to kill the other, and then using that torch to kill my last guy...done this about five times now and no achievement.

Is there a trick to this I'm missing?

[𝕊𝕙𝕒𝕚𝕕𝕠𝕟]

You have to set 5 on fire at the same time.
Not sure when I got mine, but I'm sure that I didn't used a torch. If I'm not mistake, was on a place that had this combustive puddle that I set on fire with a match, so I baited a group of enemies towards it.

[DogMeat]

Pretty sure you don't have to set 5 on fire at once. Sometimes it just takes a while for these things to register.

[Hawk Zombie]

Shaidon, you're thinking the one where you have to use a match to burn 3 at once. This is kills using the torch.

[Lee Marvin's Ghost]

I got this achievement by just playing the game and lighting 5 enemies on fire using the torch. 1 Torch for 1 kill repeat and it popped.