Exceptional Pull Not Adding to Damage

[Maidhc O Casain]

I first noticed this on a very complicated character I'm making and wasn't sure if it was something else interfering with it. So I made a simpler one to see what might be up:

Create a 3rd level fighter (13 Dex, 12 Str)
Add Deadly Aim/Exceptional Pull as feats
Add a Composite Longbow with a +1 STR rating

The weapon damage for the bow still reads 1d6+1. The feat doesn't have to be activated, and turning Deadly Aim on/off doesn't make a difference (as it shouldn't, but I thought I'd check). I don't see anything in the wording of the feat that might change conditionally in the game - a class is either proficient or not, and the bow either has a strength rating or it doesn't.

Is there something I'm missing? Or is this feat not implemented?

(I also submitted a bug report, but it's possible it's not a bug and someone here might know what I'm doing wrong).