Why trackpad wakes iMac up from sleep after activating wi-fi despite I've unchecked this option at bluetooth System Preferences?

In the bluetooth advanced options at system preferences I've unchecked the item "Allow Bluetooth devices to wake this computer".
My iMac is running Lion and sleep mode works fine, i.e. trackpad doesn't recall it from sleep, the Mac's back panel is cold and it takes a little delay to finally wake up.
Nevertheless, I've noticed that trackpad is able to wake my iMac up and the back panel is still warm when wi-fi is active. It seems to me that only the display sleeps.
Is there anything I forgot to do to have iMac full sleep mode even with wi-fi active? Note: wi-fi is only active, I'm connected to nothing.

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Message was edited by: coocooforcocoapuffs: forgot to mention that when awake, connections are made and all is peachy.

If you can't get it working, worse comes to worse you can always keep display sleep on and put hard drive(s) to sleep and disable the normal sleep.
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Long shot but...
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Resolution
Move the mouse or trackpad cursor over the center area of the login window so you can see the user icons. Click on the icon of the user that you would like to login as, type in the user's password, and press Return.
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Macster,
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Elamc,
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Why trackpad wakes iMac up from sleep after activating wi-fi despite I've unchecked this option at bluetooth System Preferences?

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