Right so I have everything I need for all four wallets I've ever created. passwords and back up phrases. and yes this transaction happened February 8th 2017. all my wallets under used addresses do not have this watch only address listed so I'm very confused on how I got this watch only address. the process of withdraw from my gambling site is very smooth and easy I just get a receive address from my wallet copy paste to gambling site and enter amount to withdraw. I've done this process now hundreds of times with 100% success rate they are a trusted site. this is definitely my fault but I don't what else to do now I feel like I've tried everything.
Let me clarify something, Four wallets in one account or four wallets in different blockchain.info accounts? Because a single account is entitled of a single recovery phrase even if it has 4+ accounts.
Have you tried using the iancoleman tool? What it does is basically derive all the addresses and it's corresponding private key from your seed (recovery phrase) so if it's not there, the address was from somewhere else other than blockchain.info
(You must have your Recovery phrase/Seed before proceeding)
Download this and
run it offline:
https://github.com/iancoleman/bip39. Paste your seed there and you will see your address/es and its corresponding private keys at the "
Derived Addresses" section. To toggle between accounts, Change the number on the "account" field where 0 is your default account, it means your 2nd account will be "1" and the 3rd will be "2" and so on.. (Use Ctrl+F to easily find the address you want)
*Toogle the External/Internal field to view your change addresses