Not sure of the cause but the remedy is taking the hood off and then the hood hinges. Once the hood hinges are off long gate the back hole (one nearest to the cowl) at the top with a rat tail file. Remount the hinges and hood then have some one put pressure ( lifting up on the nose of the hood) so that hinge is as down as far as it can go then tighten the two hood hinge bolts.Should take care of the problem with the hood sticking up.

Ron.H