I am not sure if I edited incorrectly, or if this is a problem in holiday exception generation. But here's what I see

On the calendar
1 - Click September 1
2 - In 'To date' click september 7
3 - Title: First week september
4 - Check: Holidays repeated yearly on a range
5 - Save
6 - Click september 3
7 - To date: click September 4
8 - Title: Except
9 - Generate exceptions on a range
10 - Save
11 - On right of screen - click 'Show past entries'
12 - There are exceptions generated for August 26 - 27