Did you figure it out?
In forms mode...don't open the Form 8949.
Open the "Form 1099-B Wks (Brokerage name)"
and there is an internal scroll-bar within that worksheet to go to different transactions.
(....lots of editable boxes, many empty, that I have no idea how to use since I just use the interview...but corrections to most fields can certainly be made there)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*