*moved to Samsung Galaxy S2 forums*
You won't see and change in usage statistics until the next time you charge your phone. Those numbers represent the amount of power used since the last charge, not current consumption. I would guess endgaget is a widget that polls for news and Angry Birds ...
Once you charge your phone it should reset those statistics and if you don't play Angry birds, it won't show up on the list. BTW, killing running apps will only run your battery down faster.