Hmmm. Ok, I see what you mean now. the game itself appears in the mixer. AH was not 100%. I set AH 100% to match the speaker and system sounds. Let's see if that helps the mic.
I used to have that problem, but I have started doing this and it seems to work for me:
#1- As I am signing into the game, I "right click" on the small speaker in the lower right hand corneer of my computer screen.
#2- After opening your volume mixer, excute #3!
#3- I adjust all sliders to a balanced formation(I know that this supposed to be for speakers only, Buuuuuuuuut! it seemed to have fixed my problem that you are having.
I'm not sure I understand. When I have the mixer open, all I have is device and applications sitting at 100%. So, both are "balanced" at 100%. I'll Play with that and see what it does