MS canceled my original reservation then rebooked a waitlist match for us. This may have been due to the system breaking down. Points for original were borrowed from 2021 in Nov 2019 for a June 2020 reservation. I Should be grandfathered and I could modify, cancel and rebook as I wanted right? Well, not so per MS. When I called in for another reason, I was told the New reservation would be canceled because it used more than 50% of our contract and nothing could be done. Super shocked I asked to reach out to someone else. A very kind supervisor sorted it all out and found exactly when the cancellation happened and that it was nothing I did. So, moral of the story for me is stressing to MS “please modify only, no canceling”.