another reason for dumping the jib prior to the main in high winds is the high presure going around the back of the mast and main... if you keep the jib sheeted, all that pressure gets really screwy around the mast and can stress it pretty good fom what I've heard.
Another thought on the 'inversions' is simply dropping the mast one too many times the wrong direction My old mast had 2 or 3 spills and was never the same from the tang upward... but alas, it's since snapped in half (failed spreader arm) and the new mast is "awfully perty"

Ryan
N6.0 137/391/TBD