I'm an experienced Photoshop user, but recently a problem has developed whenever I use the clone tool or the healing tool. The entire canvas shifts after I select an area to use for cloning or healing. The canvas then moves around as if I'm using the hand tool. I'm not using layers or masks, just the typical getting rid of spots from my dirty element in my camera. One interesting note, when I use the spot healing tool these issues do not develop. Any thoughts?