Guild Wars 2

I’m looking at my SAB achievements, specifically the one titled “Baby’s Second Super Adventure”. It shows:

30/31 Feats
in World 2 in infantile mode

Tier 31 of 33 Tiers

Whats odd about this is I did as the achievement asks for and completed all 3 zones of world 2 in infantile mode. So is this a bug or am I missing something?

I am at 31/32 Feats, so missing 2 in total, but I am pretty positive I have not missed a single one in any of the zones for World 2, unless there’s some that triggers in secret areas or something, which seems a bit odd. My friend is at the exact same count as me.

It is a slight bit annoying when you’ve done the 3 zones several times to see if you missed a specific point that the path is asking you to take.