macro previousSunday and isExplicitAlarm have errors
previoussunday need to be
#define previousSunday(_time_) (max(_time_,SECS_PER_WEEK) - elapsedSecsThisWeek(_time_)) // time at the start of the week for the given time
(you could remove the max, but in this case keep time not SECS_PER_WEEK) 
the isExplicitAlarm macro need to be
#define isExplicitAlarm (value > (SECS_PER_WEEK+SECS_PER_DAY)) // alarm is at the given time and date
sorry but I have spent wayyyyyy to much time with your code during the last days
regards