there was another group of 9 that you can see it in the top right of the minimap. Still got the 7 kill achievements but it wouldve been nice to know during this game glitch

They spawned like that

how did u even make this happen lol? a diversion lure?

I freaking know, but didn't know it was an achievement until after I used the grenade

The perfect setup for 7 c4 kill achievement