We've updated the interface for scheduling edits to allow you to select the exact minute you want the edit to start. When we moved Ablestar Bulk Product Editor to be embedded in the admin you were only able to schedule edits at the start or half-way through an hour but now you have more control over exactly when to start them.
After you've scheduled an edit you can now see exactly when it will start or undo by going to the edit detail page and clicking on More actions → View configuration
Learn more about scheduling edits.