Two things happened to me so far with taken king that I'm pretty sure are bugs. First one: I completed the quest "high priority targets" which said it would reward legendary marks and a legendary heavy weapon upgrade, but when I turned it in I only got the heavy weapon upgrade and DID NOT receive any marks. Second: I leveled up my vanguard to level 11, I checked the vanguard mentor and he didn't have a package for me?! Also checked postmaster just in case, but didn't receive it there either.