interesting, i wonder why the would put pads on one and paste on others... and of all cpu's why put a pad on a quad.
if there not all poking out then its not in right. as much of a hassle as it is, i would take out the motherboard then make sure all 4 pins are in correctly. turn it on then check temps.
also make sure the push pin tops are in the correct position, seen here.
(left side is correct)