When I have the camera set to manual mode that -2.0 is flashing. When I turn the command button to right or left it adjusts the shutter speed so I don't know where to change that flashing exposure compensation setting.
it's usually a +/- icon for exposure comp. MM icon is Metered Manual. So it's going to display how over/under exposed you are -- it flashes when you're outside of the -/+ 2 EV range.