Chris is correct - it is the Layout that the FC powers up to. If I change presets using the rotary knob or my MIDI control, the FC does not automatically go back to Layout 2 (it actually doesn't change to any other layout at all).
That still works for me - I have Layout 1 for my preset and bank changes, Layout 2 for my scenes (my usual performance view), Layout 3 for my dmx lighting control, Layout 4 for Looper, Layout 5 for Effects. Layout 2 is my "Default"
When I power up my FC goes to Layout 2 'Scenes'. If I want to change Presets, I click my "Layout 1" button. When I choose a Preset on Layout 1, I have Layout Link send me back to Layout 2 (performance view for me). Works like a charm...