The problem comes from a label where no voltages were labeled, and the Dots did NOT correspond with the same position (one dot was on the top of primary 1, bottom of primary 2). I, for whatever stupidass reason, didn't pay attention to the dots, and wired the top to the top, bottom to the bottom. Didn't do that one again.
That was on the first VanTOTL I built. Oh well live and learn.
Speaking of learning, my teaching assistant ship was approved, so I now get to help with the learning process of our EE undergrads. They're fucked.