I think it depends on whether you did the gas mystery shop or the audit where you had to reveal yourself to the cashier. Both regular and reveals are posted and they look identical until you get to the qualification questions, except that the reveals all say "daylight hours only."
If you did the regular mystery shop, you should see that location a month later. I consistently do the same locations every month except when someone beats me to them. I have NOT done the shop where you reveal yourself but I have been told there is a 90 day rotation after revealing.