I'm not sure if this is a bug per se, but it is a convenience issue for sure! I have been entering my work schedule into the calendar in pre-release 13 and have been making use of the recurrence feature. Everything works great EXCEPT for the fact that by default the recurrence flag is checked for Monday, rather than the day of the week that the event was entered for. Further, checking the flag for the correct day does not clear the flag for Monday, resulting in duplicate entries if one is not paying attention...