How can I log into another PC and see my own library/devices/back up? I already authorized the device, however, when I log on with my ID I can not see my library instead I see my wife's library, please help!
You will only see your library if you copy it onto that computer, logging into your account on a computer doesn't put your library on it (copying music between computers). If your own computer is 'on' with iTunes open, and both computers are using home sharing and connected to the same wifi network then you should be able to see your computer's library : http://support.apple.com/kb/HT4620
Similarly if you've backed up your device on your own computer's iTunes then that backup will be stored on your own computer - if you want that backup on the computer that you are currently using then you will need to copy it over.
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