actually, i never did see those feats in KotorI, but i did see them in KotorII. maybe those feats were one of the other things that got the chopping block....
as for NWN stuff being in the Kotor games: the Kotor games were made with the NWN engine, and a lot of things were simply converted over. the thing is that Bioware simply left a lot of the old stuff in the files, but they just simply made it so that they don't do anything if you try to mod it to work.
and when OE took over for kotor2, Bioware simply handed them the tools to work the game and the documentation on how things work. of course, OE still left a lot of cut material in the game, so they didn't exactly have time to clean up the stuff from NWN that was still
in the game files.
See the struggle of the faithless lot as they negate their time
How low to sink to the depths of their frame of mind