Wifes Pug 206 had odd lights when we got it (year old, from a main dealer).
H7 headlamp bulb was upside down. It didn't "fit", but was easy enough to get the spring clip in place. When I used to work at a garage it wasn't that uncommon to see cars with them fitted upside down.
Likewise the dual filament stop/side lamps - "I fitted a bulb and now my side light is too bright" being the normal complaint (assuming they even noticed). It was a bayonet cap with offset pins IIRC, but easy enough to force in if being ham fisted... Saying that, I've not had a car for years that used those, so maybe they've died out :-)
Darren