Yep saw this myself. I got confused myself. It was in similar circumstances but with me I spotted a Spit IX diving into a cloud off my port side and turned to chase. I punched out of the clouds and saw a Mk XVI in a shallow climbing turn and I was a like "Where did that IX go to then? He must have looped in behind me" and was looking for a target when there was nothing there.
It wasn't till I actually had a training mission in a Me109 against MkXVI spits that I realised It was a graphical shortcut.