When I create an event that repeats on the 5th Tuesday of every month, it also shows up on the 4th Tuesday (only if there isn't a 5th Tuesday). There are options for Last Tuesday, 5th Tuesday, and 4th Tuesday of the month. To me, it is a bug to have a repeating event for the 5th Tuesday show up on the 4th Tuesday. If I wanted that functionality, I would select the "Last Tuesday" option. Right now, I have to go to each month where there are not five Tuesdays and manually delete the erroneous event that shows up on the 4th Tuesday. I say "Tuesday", but it doesn't matter the Day of the week.