No its not normal for a gap that big.
Now its possible the door has been reskinned or bought second hand. Whenever i reskin a door for my self, i fit the carcass in the door frame first to get the best all round gap then add the skin.
Could it be through accident damage?
The shoulder of the door seems to line up perfectly with the shoulder of the shell.
It just seems strange that it fits the bodyshell aperture front ad rear but not on the top or the front diagonal.
I just thought of Jaws. Am i going to need a bigger door?
Is it repairable?
Is it repairable, i will say yes as i did something similar on my lads car.
When i reskinned his car doors they were pants to coin a phrase. Defo not original to the car and needed major work. Now i did go OTT with his car with regards to panel gaps etc and maybe a tad too much.
The other side of the car
Finished result
Now did i need to go this far, probably not but i was up for it and we were pleased with the result.
BUT will the window fit, that is the question but nothing has changed other than the height of the frame. And to be brutally honest i really should have started off with two better doors as like the rest of the car they had been bodged to death and back.
Heritage skins by the way as when i tried magnum it was even worse. Now since then having restored a mini Special and my own Clubby, both very extensively restored, the gaps were far far better as they were the original doors that came with the cars. I stll added some welding filler rods to the edges of the door gaps for One Pound Coin gaps but nothing to the frames.
So having digressed slightly here, the frames are spot welded to the door carcass and could in theory be split from the carcass and lifted slightly to close the gaps. BUT again a lot of work and i mean a chunk of work. Personally if you are that concerned i would look at removing the skin, repositioning the door carcass in the aperture and then offer up the door skin until im happy with everything.
Like this
gaps at the top of the door
Now i did spend some time tweaking, bending, applying some science where needed with my calibrated 2lb club hammer but finished result