After I added a new alarm many duplicates appeared ~7, Reproducible: Always Steps to Reproduce: 1.Press "Add new alarm" 2.Don't edit anything, or edit (it doesn't matter) 3.Press Save Actual Results: Several instances of the same alarm are created instead of just one. Delete, "Dismiss" or "Snooze" one alarm and the action will be also applied to all the others. Recently updated system, installed in VirtualBox from plasma-devel weekly image(Mer).
Sounds like there could be multiple instances of the Active Alarms resource that have been created? If akinadiconsole is available in your install, you could run it to find out.
I cannot reproduce it on my device, so we'll wait for more info from Antonis.