Battery Full, please remove charger stuck at top.

Basically today, after charging my batter, the 100% battery, uncharge battery SYMBOL is still in the corner by my task killer. And My battery is at 100 percent off the charger. I have been using it for like 2 hours right now and it says the same thing and the battery is still at one hundred.... If i restart the phone the empty battery picture turns on, then shuts off the phone... I have to plug it in to the charger, then turn it on, then unplug. What is the problem?

 

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sorry for double post but this is what it looks like keep in my my charger has been out for a while..