I am sure this is not user mistake, Considering that the recovery phrase was found in two distinct areas: backed up within a file on S3, and printed with a piece of paper. Standard recovery phrases use a selected list of 2048 words adhering to the BIP39 standard (Bitcoin Advancement https://bookmark-group.com/story4436145/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator