Editing a single type alarm after the alarm has gone of results in the alarm not ringing

This is a bug which could be due to the SDK, clock app, EDS or indicator-datetime. As a result I would like to do investigations in these projects and determine the exact cause of this.

Steps to reproduce this bug:
1. Create a single type alarm to ring in the next 3-4 minutes
2. Wait for that alarm to ring.
3. After dismissing the alarm, edit the alarm and set it to ring in the next 3-4 minutes.

What happens:
The alarm does not ring the second time. It is shown as enabled in the clock app, but it still doesn't ring. The updated alarm can also be seen in the indicator-datetime.

What should happen:
well if the one time alarm is intended to ring only once, then the alarm status should be shown correctly. If possible, the alarm should be deleted in that case. If not, then after editing, it should also ring the second time.