Configured a recurring test list to run daily for a month. Removing the test list does not give me the option to remove the items on the calender for that list. Likewise if I delete the series from the calender there is no option to also delete the test list. So I end up with orphans on either side. 

Give the user the options to remove the test series (when deleting the test list) or the list (when deleting the series). If the user opts out of doing so he can still remove the 'other side' manually afterwards.