Second place?
Tie-break miscalculated

Second place?
There are 8 tiebreaks and only the first one shows in the interface. There will almost never (probably never) be any ties in Swiss events here ever since those all were implemented.
https://support.chess.com/en/articles/8572860-how-do-ties-in-tournaments-work
You had a lower Buchholz tiebreak than 1st place.
Sometimes the system glitches or uses unexpected tie-break rules. It’s worth reaching out to the organizers or support team for clarification. You definitely played well, and it’s frustrating when placement doesn’t reflect that. Hope it gets sorted fairly! Had a 10-page philosophy paper due and absolutely no motivation. I looked up help and found domypaper.com. Best decision I made that week. DoMyPaper delivered something I was proud to submit. I still tweaked it, but the foundation was super strong.