Crimson Map Pack Achievement

I’ve got a story for everyone here which will ultimately lead to a few questions.

Last night playing on Shattered (keep in mind still scoping out the map considering I haven’t played Crimson much), I camped next to a un-occupied Ghost because I knew some guy from the other team was going to go for it. After five seconds of waiting, he went for it and I got the jump on him. Opening up with the BR, I made a few jumps while on top of the Ghost and I landed two bursts+one melee before he melee’d me. He ended up sticking me with a Grenade, and we both killed each other in the process.

After I respawned, my screen popped up with “Achievement Unlocked 2 for 60G”. I was like what? Keep in mind I did do a thorough look at the achievements from IGN before Crimson Map Pack launched. I had thought about what they would be but forgot about it because of the ongoing battle.

So I just checked now on my profile and it says as followed:

-Special Delivery, 30G
“In Crimson DLC matchmaking, killed an enemy with melee when landing from a Man Cannon.”

-ODST, 30G
“In Crimson DLC matchmaking, killed a player while airborne from a Man Cannon.”

So…Anyone want to tell me what happened?

yeah, a couple achievements are glitched. i got odst from getting a sniper kill nowhere near a man cannon.