Photoshop document Canvas are always anchored that way the top left corner 0X,0Y you can turn one the rulers as see where 0,0 is. It looks like you have been moving the canvas in photoshop image tab view. You can user the scroll bars to center the canvas in the tabs view. If you zoom way in the images will not even fit in the tabs view. If you turn on the rulers you can drag the 0,0 anchor point to some it point in the canvas like a subjects eye.