Default CM 11 installed but problem charging with phone off

rooted my samsung note 2 (N7100) the hard way (by flashing philz with odin then having to take the battery out because otherwise samsung reinstalls its own stuff), and successfully. then flashed cyanogenmod (the latest snapshot). every works great. but if i charge the phone while the phone is switched off, the big grey battery icon comes on screens, and stays there with no animation. and when i unplugged the charger, the battery icon is still there,. i have to hold the power button down to hard reset it each time. if not the battery icon stays (hence the screen remains on) and just withers away the battery. tried everything a layman could do. flashed back to stock samsung, everything works fine. tried omnirom, same problem. tired using CMW as the recovery as well. any ideas would be much appreciated.