I opened a Drawing and did a Pack and Go into a folder I had just created, with today's date as the folder name. A new folder "Miscellaneous" showed up in it without me doing anything, with a "Date modified" time several minutes in the future, which I thought was rather odd. At first it was empty, but after the Pack and Go was finished it contained a single Part from my Assembly, and it's one of my Library parts that I neglected to de-select from the Pack and Go dialog. Still, this never happened before. Maybe that's the time it planned to put the Part in the folder?
Not sure about the forward time stamp but the folder may have been created if the "Flatten to a single folder" checkbox was unchecked.