1991 nissan patrol {curly one}

Hi to everybody, I got another curly one with my patrol. about four weeks ago my wife takes the kids up the shops and my 8 year old son jumps out the passenger front door to find that he couldnt shut it again. the door has dropped about half a inch at the striker. Now the gue nissan put between the hindge and the post is still in good condition same with the hindge and the door. hasent even cracked the paint. also there's not enough play in the pin to warrant the half inch drop. WHY IS THIS SO.? Then about two weeks ago i noticed the windscreen rubber has broken in the top right corner about two inches in from the pillar and would have to be a inch gap. WHICH NOW LEAKS,, we dont do a lot of 4w driving as to the lack of time. Could this just be a freak of nature that they hppend at the same time ? or my worst fears and for sum reason the body has a twist in it. any info would be taken on board with open arms. thanks jim.