When I view my files and folders in my Dropbox account online, the "Modified" sort column will not show dates for any folders in my account. The column only shows two hypens for each folder instead of a date. The "Modified" column will show dates for FILES, but not for any folders. (I actually have 2 Dropbox accounts, and this problem happens in both of them).
If I right click on a folder and choose "Folder Info," the correct Modified Date is shown in that popup for that folder, but for some reason it's not populating in the Modified column in the list of folders.
I also suspect this is causing an issue on the file sync with the Windows desktop app, because my folders that I sync to my PC through the desktop app are not pulling the "Modified" date from Dropbox and are populating with today's date instead. The FILES I sync, however, do come through with the correct date applied.