I'm positive it's not person error, Considering that the recovery phrase was located in two unique areas: backed up in a file on S3, and printed over a bit of paper. This article explains BIP39, the standard that defines how seed phrases are created, and summarizes how BIP32 and BIP44 https://hotbookmarkings.com/story18966604/5-simple-techniques-for-bip39-seed-phrase