When I cut and paste something into an existing image in Microsoft Photo Editor, it sort of pastes twice. It fixes itself permanently in the top left corner, and also makes a copy of itself available to be dragged around to wherever (which is what I want).
But how can I get rid of it from the top left corner?
Hmm… I just tried that on my machine and it worked fine. It did initially paste it to the top left corner, but moved when I dragged it.
What picture type are you working with? I just tested with jpg.
OK - I open and select a jpg.
Drag a box round an area, copy and paste.
The selected area appear in the top left, with the moving selection loop still round it.
I can move it, but when I do, there is still a copy of it in the top left corner.
Seems to happen across all pic types.
OK - I have narrowed the problem down. The sticking-extra-copy-top-left thing is only happening if I CTRL+P the image. If I right click and select paste from the menu, it doesn’t happen.
CTRL+P is configured as a Macro is MS Word (Select Special:paste plain text) - could this be interfering with its use across other applications?
Aha! I just replicated your problem. For me, it only happens when I paste to the same image I copied from. It works fine when pasting from one image to another.
As you say, if you right-click-paste or choose paste from the edit menu it seems to avoid the problem.
I have no idea what’s going on, but at least you’ve found a work around. I guess you could save the image, reopen another copy, then paste to the new copy of the image… but then that’s kinda defeating the object of the “shortcut” keys! 
I dunno if it is something to do with your word macro, but the same happens on mine when I just use the normal “Ctrl-V” shortcut.