I'm guaranteed this isn't person error, Because the recovery phrase was present in two different spots: backed up in a file on S3, and printed over a bit of paper. This informative article describes BIP39, the standard that defines how seed phrases are made, and summarizes how BIP32 and BIP44 https://bookmark-media.com/story18941266/detailed-notes-on-copyright-wallet-seed-phrase-out-of-bip39