How are you trying to adjust, by lifting the door, twisting the door or lengthening it? if your lifting at the rear because its out of align use a block of wood on a trolley jack under the back of the door and jump up and down on the sill plate, keep the door close to shut, you might have to increase the height of the jack as you try.
Twisting, use a block of wood between the sill and door rear and just push hard, but watch the main door top as it bows abit near the quarter light.
Top frame, shut the door against a lump of wood and push the top frame in, or shut the top of the door against a lump of wood to bend out.
Lengthening, use a block of wood in the door jam so the door is close to the body and push the door to shut.
Shortening, no idea.
I did struggle with my n/s door sticking out at the bottom and ended up making a door stop at the bottom, have a look on my thread.
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