When the Daylight Savings Time (DST) check box is checked in the Date & Time control panel, by design, the time will advance by 1 hour. Unfortunately, the Map control panel does not recognize this option being checked when the set button is clicked. As a side effect, the Map control panel incorrectly selects the time zone next to the correct one (1 hour off) and defaults to the city that is alphabetically first in that time zone. This problem should be fixed in a future version of the Map control panel.
Currently, there are two workarounds to avoid this problem:
1) If the Daylight Savings Time check box option is checked, don't select the Set button in the Map control panel after setting the correct Time Zone and time in the Date & Time control panel. When changing Time Zones, change cities only in the Date & Time control panel since it recognizes the Daylight Saving Time option.
2) If a user wants to be able to change the set location in the Map control panel, make sure the Daylight Saving Time check box option is unchecked in the Date & Time control panel. Set the correct Time Zone and time manually in the Date & Time control panel. Now the set button should work correctly in the Map control panel.