It is indeed strange you swapped converters and then had a failure. When you pull it apart you will have all your answers.
Idk that I myself would have any answers other then "yep that's jacked up" but why lol. Maybe but I don't build transmissions so. I guess I can send the converter to get get cleaned and checked and pull it apart it'll be a week or so before I have time to pull it back out. I have one lift in the shop and need it for other jobs.