endgame "double blunder"

i have been at a regional team chess tounament today, and here was a position reached in the last game...
rather humorous...
for simplicity's sake, we will call black a player on team A
and white was a player on team B
being the last game, the score was standing, after 3 games, at 2-1 advantage to team A
in a 4 round tournament, they had 3 points: undefeated as a team
even if player A loses, their team will draw, get the half point, and still win the tournament...
so it didn't matter as the games were unrated...

anyway... the funny part...

i can't do the FEN thingy, so i'll just describe the board...

Black:
pawns g6, h5, d6, e5, b6
Queen c7
knight c8
King f8

White:
pawns g5, h4, d5 e4, a6
Queen b5
Bishop e3
King f3
this was the position reached with white to move

as a spectator, i thought this was a drawn game...
white plays...but!
Qc6
even after a few minutes, i thought this was a game winning move, as white would have two passed pawns and easily out maneuver the knight...
then I started to notice things
a. the pawns are not connected after a queen swap here...
b. the bishop is on the wrong color to promote a pawn after a queen swap
c. the white king is not close enough to stop the black king rounding up those pawns and winning
d. after some clculation, i determined that the knight will always be able to stop those two pawns from promoting
e. in addition to not being able to help its own pawns promote, the bishop does not even control the b1 queening square for black


so, Qc6 was a game deciding blunder, as ...Qxc6 wins easily for black until!
black fights blunder with blunder:
Qb8

white does not screw up again and replies with the obvious Qb7, trapping the queen and promoting the pawn...
i thought it was amusing...

Originally posted by rubberjaw30
Black:
pawns g6, h5, d6, e5, b6
Queen c7
knight c8
King f8

White:
pawns g5, h4, d5 e4, a6
Queen b5
Bishop e3
King f3
this was the position reached with white to move

Here's the FEN after white plays Qc6

Originally posted by wittywonka
Here's the FEN

[fen]2n2k2/2q6/Pp2p1p1/1Q1pP1Pp/3P3P/4BK2/8/8[/fen]

uhh...
no
wrong FEN

edit: sorry, didnt see your edit...

Originally posted by wittywonka
Here's the FEN after white plays Qc6

[fen]2n2k2/2q5/PpQp2p1/3Pp1Pp/4P2P/4BK2/8/8[/fen]

corect...
white had just moved th queen there...
if a queen exchange occurs, black wins by bringing in the king... to save the day...
but black pulls the queen back with Qb8, losing the game after Qb7, forcing an exchange and a promoted pawn...

Originally posted by rubberjaw30
corect...
white had just moved th queen there...
if a queen exchange occurs, black wins by bringing in the king... to save the day...
but black pulls the queen back with Qb8, losing the game after Qb7, forcing an exchange and a promoted pawn...

Ok, clearly we can see how Black blundered with Qb8 but how did White blunder again with Qc6? What else could White have done (other than accept a draw...)