There are unbeleivable mistakes with transferring STEEM/SBD.
It looks like some exchanges already has an ownership of misspelled accounts or owner of that accounts are too honest people, but some of them looks like not correct accounts!
You can check following wallets' histories.
https://steemit.com/@bittrexx/transfers
https://steemit.com/@bitrex/transfers (Imagine steemit's social media manager send his SBD's to wrong account too | Sorry @hilarski i had to wrote this one :) )
https://steemit.com/@bitrexx/transfers
https://steemit.com/@bittre/transfers
https://steemit.com/@polo/transfers
https://steemit.com/@polonex/transfers
https://steemit.com/@polonie/transfers
https://steemit.com/@polloniex/transfers
https://steemit.com/@randomwhale/transfers
https://steemit.com/@blocktrade/transfers
https://steemit.com/@coinpayments/transfers
There are probably lots of possibilites with this situation. Maybe just for official exchange's accounts and bot's accounts, steemit inc ( @dan or @ned or @steemit) can add Auto Complete at transfer modal.
Sorry for my bad English