Very informative, and good of you to not only share with us your blunders
but also take the time in offering analysis for multiple games.
Your cumulative performance across the games seem to approve the hypothesis that
"the more games you play simultaneously, the less concentration can be input - quality suffers consequently"
(As discussed in the quality vs quantity thread, like you stated)
My only additional comment is for the game where you offered a draw, but your opponent didn't see it and played the conditional move:
If realised the offer, would he have accepted the draw?
- If so, I reckon it's a wee bit harsh playing on to win
Anyways, kudos for your commitment to the game... maybe next time go for the hundred?