Here's one: what if you have R days to the end of the month and start the same reserve from the beginning of the next month (several weeks of continuous reserve crossing the bid-month divider) and you call in sick after sitting a couple days reserve? Do those days served at the beginning of the string count for the next month or would one have to get well before the end of that second month of R days ended to not be hit for the entire second month of R-days?