looks like cybre.space might be having intermittent problems with duplicating new posts made by users on here, looking into it now. (in the meantime, if someone sends you multiples of the same reply, it's probably not their fault!)

cybre.space users: this appears to be due to the cybre.space web server taking too long to respond and returning a 504 / timeout error. if you see this happen, it might mean the server is just processing slowly and will eventually submit the post! (looking into why it's taking so long, but this should help you avoid accidentally submitting duplicates in the meantime)

server slowness appears to be due to degraded disk performance on the host, following up with them to see if there's anything to be done about it

well, this sucks