I'm confident this isn't person mistake, since the recovery phrase was located in two distinct locations: backed up within a file on S3, and printed on the piece of paper. This information points out BIP39, the standard that defines how seed phrases are created, and summarizes how BIP32 and BIP44 https://social4geek.com/story4372098/little-known-facts-about-bip39-seed-phrase-list