The loss of collections was a bug in one of the recent firmware. It has since been fixed.
I'm not sure about the Date and Time. If you are talking about the clock, then it should be updated each time you connect to WiFi. But, if it is out by to much (no, I don't know how much is to much) the time won't be changed. I haven't seen any problems with this. I do use the clock all the time, and it is accurate. I haven't seen any issues with the date. Of course, it might be an idea to check the timezone.
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