Can't Choose Lots to Sell

I use Quicken for Windows, and there are some significant differences between the Windows and Mac versions of Quicken, so I don't know which of the following might be of help.

1.) Make sure you're entering the sell in the correct account. 2.) Exit Quicken, then restart Quicken. 3.) To aid in discovering where all your shares are held, create an Investment Transaction report for that security only, subtotalled by Account. 4.) If Quicken for the Mac has the capability, recalulate the register of the appropriate account. In Quicken for Windows, I'd put the cursor in the date field of the investment account register, and press CTRL + Z. 5.) Try deleting and re-entering one or more of the buy transactions that acquired the lots you want to sell. 6.) Make a Quicken "Copy" of your data; try the sell in the "Copy". 7.) Validate the "Copy"; try the sell in the Validated Copy.