If you have a confirmed reservation, can you make the reservation shorter but keep the rate you've already been confirmed at?
As an example, I have 1 reservation for a Monday-Friday. Monday night is now a lot cheaper than when I booked it, but Tuesday-Friday have gone way up. I've made a separate confirmation for the cheaper Monday, but still have the original Monday-Friday intact. I'm hesitant to modify the original Monday-Friday to Tuesday-Friday, in case it becomes a Tuesday-Friday confirmation at the increased rates. I know I'll have to modify/cancel something at some point, but just wondered what advice people had.