[MaxRat]

you will also need to make sure the hinge side is level and square with the sill... thats where most of the problem stems from....I always make sure the hinge side is square and level then put the level away and use the door itself as a guide to fitment and place ment....

Tightening the top hinge too tight will pull the door up.... also tightening the bottom hinge to tight will pull the door down....a combo of the 2 will warp the opening.... so dont over tighten...snug then adjust....