How to prevent Bill & Income Reminders asking if I want to schedule past one-time purchases again?

My Bill and Income reminders list has a separate listing (at the end of ones I've auto-scheduled myself) of possible future bills, based on past one-time purchases. This list is headed with the question "Schedule these?" I don't want to schedule any of them, they were one time purchases, and it's a pretty long list. How can I delete all of them at once (is it even possible?), and how do I prevent Quicken from suggesting more? This seems like not a very useful feature to me.