
lemeres |

Unless stated otherwise, you can only take a talent (and in fact, most options in this game, in fact) one time.
That is why there are two rogue talents that give combat feats- one on the base list, and one on the advanced list. You are not meant to get more than 1 freely chosen combat feat per 10 levels with the talents.
It isn't like you don't already have a ton of options for free feats, since you can grab ranger style feats and all. Alont with combat trick, you can grab 4 extra feats before level 10 (5, since there is a trick that gives weapon focus). You can already fill all your level 2-10 talents with combat feats.