GG "Rotate 1/2" Setting maps both 1 and 2 to Y button

[emkultra64]

Found this out when I loaded in the Game Gear port of Gunstar Heroes and turned on the "Rotate 1/2" setting. While 2 gets mapped to the B button as expected, both 1 and 2 are mapped to the Y button at the same time, making it impossible to press the 1 button in a normal fashion when this setting is enabled.