AnniversAry stats are wrong

It says I haven’t collected any skulls, even though I have all of them, it als says I have spent 95 days on legendary campaign on the level Halo, which is ompletely overestimated, most of the mission times stats are like this.

Why are these so wrong?

It does that for me too; I wonder if 343i will be just as lazy with Halo 4 and have broken stats as well.