Since skunk mentioned we don't have enough of these sorts of threads anymore...
I just lost a game that I was winning 11-0, and I lost it because I messed up my pitcher settings.
I had a Tandem A/B pair of pitchers ready to go, with A set for 20 pitches, and B for 100. Unfortunately B didn't get into the game because I forgot to change his availability from 9 and I had a reliever whose availability was 8.
So after the Tandem A guy left, the reliever came in. After the reliever pitched, I had a few other relievers available for the 9th, just like my Tandem B pitcher. Sparky went through them, and THEN there was no one else available except my 7% Mopup and my Tandem B pitcher. Again, both with INN AVAIL set at 9. Sparky went with the mop, even though I have Use Mopup Only When Losing checked off. You can guess the rest.
So yeah, it's my fault for screwing up the settings. But why, when the Tandem B was available in the 9th, just like the Mopup, would Sparky opt for the Mopup?