If you are only getting one day what is your bill close date if it was yesterday that is all you will have you many have to wait a day or two for the bill to print to see last months call
Adding a delete button when the call log window is opened (i.e next to the print or export button) would be useful.
In the programming world that is a very simple thing to implement.
I would even put a check box for "Do Not Track Call History".
Hopefully these changes can be executed in the near future on sprint.com for managing your account.