Okay, so I have this problem I can't seem to find anyone else who does. So I'm trying to move a loop of vertices on the Z axis (First pressing G, then Z) but the problem is that it only LOOKS like it's moving up, but when I rotate the camera it's moved in some odd direction instead. I've also tried inputting the amount I want in to move via the keyboard instead of with the mouse, with the same issue. I've tried this from every angle, to no avail. Any help is much appreciated.