Clocks go Forward - Garmin Borks

Why is it whenever the clocks go forward or back I seem to have some sort of problem with my Garmin devices?

I had an 08:30 alarm set on my f5 Monday-Friday, but I just noticed the alarm indicator wasn't showing on the display. I went into the device settings on GCM and for some reason the only alarm showing was one for 08:00 Sunday (I never set that one up). I tried to change it to 08:30 M-F, but whatever I set on the dropdown, the actual setting above it appeared one hour later (i.e. 09:30), even when I selected 'Done'

So, I deleted that alarm and tried to add a new one. But now whenever I tap 'Create Alarm', GCM just crashes back to iOS SpringBoard.

Anyone else?