Some of the mini boxes aren't showing the correct time after the time change. It shows 7 instead of 8 for example. I restarted it, called tech support. They couldn't figure it out either. Maybe they need a firmware upgrade.
I had to restart my mini box a couple of times to get it to reset the time. But we are aware that some mini boxes do not upate the time after a restart. We have reported the issue and are awaiting a resolution.
When I unplugged my mini-box for a few seconds a couple of times, the guide time didn't correct. But, when I left it unplugged for a few hours, the time was correct when I plugged it back in. I'm not sure how long it needs to be unplugged, but it's somewhere between a few seconds and a few hours. For anyone still having this issue, unless you're just not going to use it for a while anyway, as was my case, I'd probably suggest unplugging it for a couple of minutes.
I wonder if there is a BIOS in these things without a battery. There might be a rectifier in it to keep it timed for a few hours and once it depletes, resort to a network sync. Weird how it doesn't correct for DST.