@josuah, when you say title which title did you change, the meta-title or a document <h1> title or both? Also how long ago did you make the changes?
@Frost_Angel, you don't change links and titles when pages rank well (did you also changed the content?). You keep exactly the same URLs and no 301s. And there is a number of factors introduced when you switch from physical pages into a dynamic cms. HTML structure, links navigation, speed performance, etc., they all need to be tuned.