When I copy and paste a layer into the same document, it moves slightly. I need the pasted lyer to be exactly on top of the base layer.
Happens to me seemingly randomly all the time. I make the new layer about 50% transparent, move it pretty close and zoom in for pixels about 1/2 cm wide, hide the layer, make it show, move it a little, repeat, until toggling shows it exactly in place. It always happens if I do select color range on a layer, alter the range, copy and paste. Rarely if selecting from the bottom layer.