Problems on CCMoveTo

Problems on CCMoveTo
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CCActionInterval *actionTst = CCMoveTo::actionWithDuration(2, ccp(100,100));
It means to move the sprite to 100,100, right?
But if i put this to the close button in the HelloWorld scene, like:
it becomes to move relatively.

btw, why FPS displayed on the left bottom side becomes no more than 30 while i didn’t set the FPS