I know this is old, but just wanted to update just in case someone else had the same question and finds this thread.
I
was able to successfully use our passes on Nov 16th (first day of use was Nov 2, the day after the last
MNSSHP) and even upgraded to APs at 10:30 that night.
Maybe the 14-day rule has changed with the introduction of
MDE and MBs to where it is counted as Nov 2 + 14 days = Nov 16, rather than Nov 2 = day 1, Nov 3 = day 2 etc (in which the 14th day would be Nov 15)