Crimson DLC Glitches and LE

Ok so I was playing CTF on Wreckage and boarded a ghost, when I got the achievement for killing someone while in a gravity lift…??? It seems 343 is having issues with basic achievement unlocks. First some achievements wouldn’t unlock after completing the requirements (Dedicated to Crimson) now they’re unlocking for no reason. Anyone else having a problem with this? Also I saw on the forum that supposedly the map pack is free??? I know its free for Map Pass owners and LE owners but is it really free to the public?
If so, I guess thats good… But I feel like I just got screwed by 343 3x with buying the LE (The whole Specialization’s thing, the ‘Making of Halo 4’ is nowhere to be seen, and now possibly the map packs being free.)