Xbox Achievements in Shared Worlds

[garethjduddell]

So my friend and I loaded up the world after the 1.0 release. I Built tier 3 arrows and got the achievement, but when he built some his achievement didn't pop. Similarly enough, when we plugged up the haze cannister (he plugged it as I already had thr achievement) his again did not unlock. this is a shared world and I'm worried that if we progress through I'll be the one getting thr achievements and not him when it's a team effort. 

 

is this just a bug that is in the process of being fixed or is this because I am the creator of the world and was hosting it?