Question What does an arrow in front of a mix-level parameter mean

The arrow in front means that you have assigned a modifier to this specific parameter. Please check your modifier settings in the modifier menu and make sure you haven´t connected the modifier to something you don´t want. Also check the Utility menu and make sure you have set the MOD Master parameter to "PRESET". This way when recalling a preset, the G-Major will look at the stored setting instead of to the current state of the expression pedal controlling the parameter.