It's kinda weird it only applies to the main outs and not amp out.
My main outs go to FoH, they have a bazillion EQ's...
My amp out goes to....yup, my amp (headrush 108), which, you guessed it, doesn't have an EQ :-(
So, I have 2 options:
1) Adjust every preset I use to my amps EQ, and "reset" those changes in the Global EQ to FoH.
2) Use amp out to FoH (mono only), and use the main out(left) to my amp. This option I use currently.
PLEASE LINE 6: Make it so I can choose which outputs the Global-EQ affects