I updated some PEM studs on a part and had to reattach a couple of coordinate dimensions. They are not in line with the others so I wanted to move them into place. When I select the dimension, however, it only wants to stretch downward in an uncontrolled manner. No matter which way I move the mouse, the dimension only goes down. Here is a Jing video showing the issue:
No idea if this helps, but have you broken the alignment set?
Similar behaviour in diametric dimensions as well, if you pick a point as the axis centre, you cannot control which axis SE dimensions. You can get around it by selecting an axis as the first point.