I'm just speculating from watching the games I've seen. Many times we leave the opposing slot receiver "uncovered", except by a safety 12 yards off the ball, and the corner up in press coverage, or at least it appears to be press..it might be a zone. Regardless, only reason I can see as to why we would do this is that we are worried about getting beat deep. If you move a backer over, its a mismatch. If you bring the safety up, then you are one on one outside with no safety help. If its supposed to be zone, then I don't understand that alignment. So what does ND do? They read the safety off the slot, the receiver lined up wide locks up our corner. They pitch it out to the slot and he get 5 to 7 yards easy. Too easy in my opinion, but maybe that's all we can do. Our corners got scorched against ND. How many pass interference penalties did we get with Wigham holding on for dear life? I personally could live with less blitzes and straight up defense here and there.