No-its just like any other picture editor, whereby you get 2 'brushes'-if you right click a colour in the pallete, that goes on your 'right' brush and left clicking goes on 'left' brush. Therefore there are 2 colours by using left and right click.
Either i'm too used to Tgf and dislikes MMF for that, or MMF is just has a bad layout. The discussion goes on and on...and on... (i vote for the last option )
Yeah, I got MMF and its a lot more difficult for me to deal with than TGF, hopefully I can get used to it and prefer it over TGF. Hopefully... for my wallet's sake.
You do get used to MMF after a while. A persons greatest weakness is resistance to change. You got used to TGF so just give it time and you'll love MMF (in a strange way)