I have multiple people in my organization using our Constant Contact account to create and schedule emails. It has happened multiple times where employees schedule emails to the same lists at the exact same time. This causes the members of our database to receive two emails within two minutes of each other, which is a huge marketing no-no. I think there should be an option to set parameters so emails can not be scheduled within a certain numbers of hours from one another. If this isn't a viable option, I at least think a box should pop up when someone is scheduling an email at the same time as another that there is overlap. It's embarrassing to send emails so close together without the realization. And I think this solution could easily fix the problem for any organization where multiple people have access to the account.