The order in which the cursor advances through the recurring todo form when the monthly recurrence pattern is selected is not logical. Currently, it goes:

1. from Recurrence Period
2. Starts on
3. every x months in the day number option
4. ends on radio select
5. the every (number) of months in the x day of the mouth option
6. the number of times in the ends on options
7. the ends on date field of the ends on options
8. the recurring actions radio option
9. the day number in the x day of the month option
10. the set recurrence radio select
11. the show the todo radio always / x days before
12. the show x days before number field
13. then it seems to leave the entry form altogether...

Instead, it should go:

1. from Recurrence Period
2. Starts on
3. ends on radio select
4. the number of times in the ends on options
5. the ends on date field of the ends on options
6. the recurring actions radio option
7. the every (number) of months in the x day of the month option
8. the day number in the x day of the month option
9. every x months in the day number option
10. the (first/second/third/etc) occurence select (you can't seem to tab to this at all now)
11. the (sunday/monday/tuesday/etc) of the month select (you can't seem to tab to this at all now)
12. the set recurrence radio select
13. the show the todo radio always / x days before
14. the show x days before number field
15. the create button
16. the cancel button

(I hope I got the right. It is a challenge to verbalize each of the elements!)
I think the flow for the day, week and year is ok, expect, I don't think you can ever tab to the create or cancel buttons. This feels like it would be a big accessibility barrier.