Try changing the DST end date to "Nov" "1st" "Sun". It will only allow "Sat".
It won't allow it because the "1st week" of November 2014 only has Saturday.
(November 1st 2014 is Saturday).
The DST page seems to be selecting "the Sunday of the second week in November",
rather than using the correct "first Sunday in November".
This also explains the odd default values...
So what will happen next year when NA DST ends on Sunday November 1st, 2015?
Will the DGL5500 correctly select the first Sunday -- November 1st, 2015?
Or will the DGL5500 incorrectly select the Sunday of the 2nd week -- November 8th, 2015?
(Same problem next year for NA DST start... March 1, 2015 is a Sunday).