Just take out the spare wheel and have nothing in there, that way it passes.
But the guy doing the roadworthy is an Idiot and i don't mean it in a polite way. I bet he would pass a 1960's car with no hazard switch as that's how it was from factory, but the spare wheel in a separate area to the occupants may be lethal in an emergency stop! Ridiculous.
From the factory Alfa Romeo never had the spare wheel secured on the 75, so he should pass it.
Regarding the door seals, they are get picked on due to the fact "exhaust gases" are able to travel into the car, there was some case years ago apparently a kid was in the car with it running and it fill up with fumes. Well that's how the story goes any bazzzzz....