Default [Q] Data usage not accurate

Somehow the data usage on my SIII (ATT 4.1.2 stock rom, rooted) is not working properly. The total usage seems right but the itemized usage is not showing up correctly.

For example: it shows on the chart that the total usage for today is 5mb, but below the chart it says "No apps used data during this time."

What could cause this problem? Can anyone help? Thank you!