Task List Alerts keeping sending, even though alerts have been turned off

Question

We have about 12 or 13 task lists, which have between 15-25 tasks per list. Originally, the task lists were setup to have an alert on each task to send past the due date. We realized after the due date that this was sending way too many emails, so we turned off the alert on all tasks other than the last one on each list. We continue to get email messages for every task every day (and when you have have multiple task lists, the number of emails can be overwhelming).
When we turned the alert off, should that not have stopped those messages from sending? Is there something else we can check to try to find the root cause of this issue? We don't want to stop the application from sending emails all together, but we want all the alerts that we removed to stop coming in.
Thanks!

Answer 1

There are no viruses that affect iOS.  There is no way the device could be infected unless it was jailbroken which would void your right to support from Apple and these forums.
Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new).  Try each of these in order until the issue is resolved.