I think the $375k is another logical error by the employee that posted it. If you refinanced once and your mortgage was under $375k, this defect in theory wouldn't impact you (summing up the 1098s would still put you under the $750k limit). Obviously, this doesn't work if the mortgage is then sold and you end up with three 1098s, which when summed up may put you above $750k.
Just poor execution all the way around.
