said by JeepMatt:
I've seen instances of that on the Xfinity forums on the Comcast website.
Apparently even though the programs are stored on the DVR - the information about them is in the cloud - so if their cloud infrastructure hiccups - it'll look like the programs aren't there, even if they are.
Thanks for the info Matt! Yeah I've seen instances about the hard drive capacity issue reported on the Comcast site but hadn't seen anyone report about missing recordings reappearing. The cloud theory does make sense.