Reply to "Buyers getting requests to pay after having paid"

Click on Sales Tab,
Click on Manage Email Templates,
Hit modify.
Change the File name (I just erased the word DEFAULT). You have to do this because it will not change the default pages, it will save it as a different file.
Then hit save.

THen go back to SALES tab,
Click on Auto Email Manager,
Hit scroll bar and click on new saved file.

Then you may want to go back to your Sales, Manage Templates page just to check if the changes are in effect.

Good Luck!