We upgraded to 4.6.2 in our test environment and since then our membership renewal reminders are sending emails each time the cron job runs. The reminder is scheduled to send 2 days before membership expiration with no repeats. Our cron job runs every 30 minutes, so the reminder is sent every 30 minutes for the entire 24 hour period. Is there something I need to reset? This only happens with reminders that were set up prior to our 4.6.2 upgrade. All new reminders work properly.
This does seem really similar to issues.civicrm.org/jira/browse/CRM-16514. Could use some help looking into it. I can duplicate the issue.