[Pathfinder] Power Attack bonus for off-hand and secondary natural weapons

When researching a correction to Piranha Strike I noticed something with Power Attack. "This bonus to damage is halved (–50%) if you are making an attack with an off-hand weapon or secondary natural weapon." Looking in the cr_feats.lst file, I see "/2" on the off-hand entry on line 195 but not on the natural secondary entry on line 200. I have not checked the OS to see if this 50% is supposed to be implemented there. But the two entried in the lst file appear inconsistent.