I have a question about the way in which classification is ordered in Any% normal. Why does the ranking follow an order until position 89 and then follow another order that does not match the times of people in the 90th and lower positions? Does the RTA have priority? Thank you very much in advance

RTA has priority. If a run does not have an RTA, it is automatically put at the bottom, which is sorted by only IGT.

Yep, that goes for all the leaderboards. Mind you, you're free to compete for IGT if that's what you want, and you can click "in-game time" at the top of each leaderboard to sort by IGT, if you prefer that.

feelsbadman