It could be. Like the main TIGER import, the TIGER boundary import was a collaboration between a few different mappers who might not have been working from the same script. After the import, there was a push to convert the imported ways to boundary relations, but it was very ad hoc, so there have been many mistakes, as we’re discovering now in Indianapolis. Some mappers may have even deleted these tags based on some unfortunate wording in the border_type=* documentation that kind of makes the key sound deprecated. I suspect we can get this issue fixed pretty quickly, like we did with county seats.