I had the same problem with the EnergyROM. Solved it by setting the timezone via [Start] > [Settings] > [Clock & Alarms]. When I tried to set the timezone via Sense the option of choosing the timezone was grayed out. Maybe one of you overlooked it, too, like I did
on the [Start]-[Setings][Clock & Alarms] the timezone is set to Casablanca, hence the problem with the DST
just changed it, et voilá! all is in sync, all around (time, calendar, sms's, emails...).