Just in case even the questions confused you, let me step back and outline the structure of the bank supervisory system in the United States. If you want to open a bank in the United States, you must get permission - that is, a charter - from a government agency.
There are two ways to do this: state governments charter “state banks,” and the federal government, through the Office of the Comptroller of the Currency, charters “national banks.” Thus, each state has a state bank supervisor. At the federal level, things get a bit more complicated. The Comptroller of the Currency supervises national banks.