According to the documentation:

/users/{id}/top-answer-tags or /me/top-answer-tags – Get the top 30 tags (by score) a single user has posted answers in.

However in practice, when retrieving data from this URL, I get a response with total set to 378 - this is correctly flagged as an error by my test suite since it conflicts with the definition provided above.

I assume that either this route returns more than the top 30 tags (and the documentation is incorrect) or the route does not return more than 30 tags (and the implementation is incorrect). Judging from the fact that I can retrieve page 2 from the results, I assume the former.