Crystal Reports Recurrence

I'm working with Crystal Reports 8.5 and we're using a webbrowser to view the reports. Each report is scheduled to run once every day (using a recurrence), That works fine. However, the users also have to option [Run Now], to generate a new instance of the report. That works fine as well, however it also generates a recurrence. This means that if you click [Run Now] 5 times, it generates not only 5 instances, but also 5 recurrences. We don't want that. Is there a solution to that problem?

Thanks.