I recently purchased a new thermostat kit, part number m-3802968. This is the thermostat that is supposed to be a higher quality replacement for our trucks than the standard napa specials, like the one that was in my truck. This new thermostat has two vents, 12:00 and 6:00, and they don't fit into the opening in the thermostat housing. This keeps the thermostat from seeming like it's fully seated in the housing. Is there something obvious that I'm missing here, or did I get the wrong part. The part number on the thermostat itself is m-3972071.