Called reservations this evening to modify my two reservations, wanted to cancel the reservations using points at my first choice property and free night cert at second choice property then use the free night cert for the first choice property. Phone rep was able to cancel both reservations, points and free night cert showed up immediately in my account. The rep wasn't able to use the free night cert at my first choice property claiming that they didn't have any availability. Checked the website myself after hanging up and while it took a couple of tries I was able to book my first choice property using the free night cert.