I'm having a dumb moment here as I can't understand why when I use a plane on a bookmatched top one side of the face (call it the left side) planes smooth but tears out on the other (right side) in the same direction. My brains telling me that that if I allow for the fact the left side grain direction is sloping off to say the left then the right side should be opposite and just require a slight direction shift while planing, not a complete opposite? The wood in question has been sliced lengthways and opened like a book and joined. Which to my understanding is what book matching is? Someone wanna take a min to explain this to me before my brain melts, poors out of my ear and gets soaked up by sawdust and plane curls? Pretty please?