The following rules govern priority among conflicting security interests in the same deposit account: A security interest held by a secured party having control of the deposit account under § 9-104 has priority over a conflicting security interest held by a secured party that does not have control. Except as otherwise provided in paragraphs (3) and (4), security interests perfected by control under § 9-314 rank according to priority in time of obtaining control. Except as otherwise provided in paragraph (4), a security interest held by the bank with which the deposit account is maintained has priority over a conflicting security interest held by another secured party. A security interest perfected by control under § 9-104(a)(3) has priority over a security interest held by the bank with which the deposit account is maintained.