The following rules govern priority among conflicting security interests in the same deposit account:
(1) A security interest held by a secured party having control of the deposit account under G.S. 25-9-104 has priority over a conflicting security interest held by a secured party that does not have control.
(2) Except as otherwise provided in subdivisions (3) and (4) of this section, security interests perfected by control under G.S. 25-9-314 rank according to priority in time of obtaining control.
(3) Except as otherwise provided in subdivision (4) of this section, 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.
(4) A security interest perfected by control under G.S. 25-9-104(a)(3) has priority over a security interest held by the bank with which the deposit account is maintained.