Hah, this process took 8 years, 3 title companies, 3 banks, and a district judge! Thankfully it didn’t cost either me or my ex a cent to my knowledge.
It’s a very long and boring story about the most amicable divorce ever, but in the end, the title people made things right. All I had to do was write a letter to the collection agency lawyers every year saying “I ain’t paying shit” and that was the end of it until the next year for me. I’d send a copy of the bill to my ex and she’d pay it as should have been the case to start with.