Purchased the 120 mile / 7 day original category 7 travel package in August, called back 8/14, and upgraded it to a cat 8 by adding another 30,000 points. I did so as agent advised the cat 6 SPG hotel i wanted would be available once categories were reclassified. I quickly found out a few days later I was advised incorrectly.
Fast forward to post 9/18. It took 4-5 calls before I finally got a hold of someone who understood what I meant when I said I wanted 30K back because the old category 7 (330k point cost) and old 8 cert. (360k point cost) both pointed to a new cat 5. and I ended up paying an extra 30K points for the old cat 8 and not getting any benefit when it points to the new cat 5. She understood, and cancelled my travel cert, and reissued it as a new cat 5 and then gave me 30k points back i saw in my acct that day.

Fast forward another 10 days . I tried to attach the 7 day cert.. to a SPG cat 5 propriety. I called Rewards 1 week ago, and was advised that I would not be able to attahc my certificate to any SPG properties. I HUCA, got same answer. Fast forward to today. Called rewards again this morning. This time I was told I need to speak with an SPG travel adviser who said the cert was worth only 105,000 points (that is the cancellation value as I understand it) and I could not use it for a 7 day, but could use it for a 3 days at a SPG cat 5 property that charges 35K points per night. (3 time 35K =105,000 cancellation value).
So, I HUCA. Got another Marriott rewards advisor and this time I asked about attaching the 7 day cat 5 certificate to a cat 5 Marriott Courtyard property. She checked with her supervisor and came back and told me the cert was only was worth 105k points and I would need another 105K points in addition to the cert if I wanted to use it at the Marriott cat 5 Courtyard. I asked to speak with the person she got her info from and even though my call now hitting 60 minutes long , I was conveniently disconnected.