td426, First things first. From what I can see by your photos you've done a very good job so far. So don't get discouraged.

There are only a couple of things that will cause the type of problem you describe. One is not having all the hinges mounted on the same line. From the photos this doesn't seem to be the problem so try this. Deflect the elevator as far as you dare away from you so you can easily see the gap at each hinge. Look for excess glue in these spots or perhaps some glue built up behind the covering. It takes very little to cause a problem. Use the point of a #11 blade to remove the excess. You may have to take a little covering with it.

On future hinge installations deflect the control surface about twenty degrees away from the glue, glue that side (being careful not to pull the hinge and increase the gap at the hinge), then flex the surface befor gluing the other side. If you have a problem it will show up right away and you can fix it before gluing the other side. Also, CA hinges don't require a lot of glue. If glue is visible then the hinge has been over-glued.