http://iscoresports.com/

Had a situation in a game where I had bases loaded. Ground ball is hit to left field. Runner from 3rd scores, Runner from 2nd goes home and is safe on the throw at the plate. Runner at 1st goes to 2B but after seeing the ball being thrown to home plate the runner decided to advance to 3B. On the throw from the catcher to 3B a error is made by the catcher and the thrown ball actually hits the runner in the head and is ruled safe at 3B. Batter/Runner goes to 2nd.

This is how I scored it:

Batter hits medium grounder for a single

Runner on 3B Scores, adv by batter

Runner on 2B Scores, safe on the throw

Runner on 1B, error on catcher, safe at 3B

Batter/Runner advances on the error to 2B

iScore shows it on the score sheet that the batter on first moved to 2B on E2 and 3B on E2. Shouldn't it be 2B on AB4 and 3B on E2? Am I scoring this wacky play right?

From what you said, I would have scored it a little differently, but it is always hard to tell from a written description. I would score a single for the B/R, R3 would be AB4, R2 would also be AB4. I wouldn't score this as on the throw unless you judge that the only reason the runner scored from second was due to the way the defense handled the ball. Being on second, he is already in scoring position. Anyway, then I would score R1 as AB4 to second. Then I would score another play that moved R1 (now at second) as E2 with the B/R (now at first) as E2.

That is just my opinion and I can see why you scored it the way you did though.