T61 Windows 7 Battery Sleep

When I put the computer to sleep for the night, by closing the lid, the battery might show like 50%. When I get up in the morning, the battery is still showing right around 50%. However while I use the laptop the battery seems to die when the meter is showing anywhere from 10-18% left.

1. Why did the battery icon read a wrong value?

2. Is the battery at fault, not a genuine Lenovo battery?

3. Is there an issue with windows 7 and battery metering after sleep?

I have checked the USB devices (mouse) and ensured the wake from sleep was unchecked. I have done the same for the wireless and ethernet.

I ran the powercfg -energy command and here are two things I wonder about...

USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name USB Composite Device
Host Controller ID PCI\VEN_8086&DEV_2835
Host Controller Location PCI bus 0, device 26, function 1
Device ID USB\VID_046D&PID_C526
Port Path 1

USB Suspend:USB Device not Entering Suspend
The USB device did not enter the Suspend state. Processor power management may be prevented if a USB device does not enter the Suspend state when not in use.
Device Name USB Root Hub
Host Controller ID PCI\VEN_8086&DEV_2835
Host Controller Location PCI bus 0, device 26, function 1
Device ID USB\VID_8086&PID_2835
Port Path

Platform Power Management Capabilities CI Express Active-State Power Management (ASPM) Disabled
PCI Express Active-State Power Management (ASPM) has been disabled due to a known incompatibility with the hardware in this computer.