Mark,
Just entered a spin-off using the spin-off tool and not happy with results*. Researched forum and saw that you too were unhappy (8/9/12 response) that external transactions are generated inappropriately. You decided to let it be. I'm encouraging you to revisit this. The result creates misleading entries in the Executive Summary report. It confounds the "Contributions" and "Withdrawal totals and also shows a "Withdrawn Distribution" which is not actually withdrawn and which throws of the gain/loss calculation. There ought to be a better way.
Elliot
*Transaction was new security spun-off and remains in the same account/portfolio.