Did you try rebooting the iPad? Sometimes that clears up these mysterious issues.
Reboot the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider if it appears on the screen - let go of the buttons. Let the iPad start up.
Yes I did that the first time it showed the usage and standby identically. It just reset them both back to the single line. Now it is after my second full recharge since and the two timers are still identical, and battery is being depleted more then usual while asleep. Curious. I wish i could look at what iPad processes are running.