I dont know if anyone else is having the same problem, but my pc hasn't sent a snapshot for over 2 days, and when it did the last time, the stats were incorrect stating that I had only made 127 mouse clicks!
The 2 machines I see in your profile look to be sending in snapshots, both within the last couple of hours. Have you had other computers removed from your profile as you only have a few hours stats and you joined a while ago?
After looking at this a bit more, I think it was all down to the UI, because my profile was updating on the website, yet everything on the desktop app wasn't moving, so on my pc it was saying it was last updates 2 days ago, yet it actually updated about 20 minutes ago.
It has happened that if the connection between the interface and Deimos service has been severed, the interface simply "freezes". Disconnecting and reconnecting fixes it though.