[Alneyan]

I seem to recall you gain one point in any statistic every four levels, and a feat every three levels (one at character creation level, then for Level 3rd, level 6th and so on), with bonus feats for humans and some classes.

I believe only your global character level matters when levelling with multiclass characters, and not the sum of the levels in these classes. But once again, it has been a long while since I came anywhere near D&D rules.