Question about applications under the settings menu

[KrazyKevin76]

Under the home screen, hit settings, then go to applications. Under all my downloaded programs, if I click on one of them, you see all the details like storage: Total, application, Data. Used to, when I would click on one of the programs and the detail screen came up, that info was immediately populated. Now, after a day or two of usage, when i go to a program it takes quiet awhile before these numbers are populated. IT will sit and say computing.....

Is this normal? Just thought I would ask.

PS. I'm going to search now, but, what app is it that I can see my total up time/sleep time etc...

Thanks