I've also been having alarm issues since sometime 2 weeks ago. I've been on the beta software and have since switched to non-beta software and the problem remains.
I have a couple of alarms setup on my chumby one, I.e at 7:15 and 7:30 and I also have alarms set for night mode and day mode at 10pm and 8am respectively.
For the past week or so, between 7 and 8 am the backup alarm will come on and no amount of screen touching will turn it off, the only way is for me to turn off the chumby. The backup alarm even comes on when I don't have an audio alarm set for that day, for example on the weekends. This has become very annoying and I have resorted to keep the chumby off at all times.