So the Sample for a maintenance window alert says 11PM to 1AM and Limit Days to Saturday. So does that only look at the Day for the Start Time? If a maintenance window crosses midnight then technically it's not Saturday any more so does the Maintenace Window continue into Sunday?
What the maintenance window is supposed to do is start at 11PM Saturday and end 1AM Sunday but is that what it will do if you only tick the box for Saturday?