In addition to him coming back at sunSET not sunRISE. If it were the 1 day every 10 years, why would he come back at the time he had to leave immediately again, as he only gets from sunrise to sunset (not even a full day). So I totally disagree with anyone who says there is NOTHING to point to a curse not being broken.
Us not knowing 100% without debate is what makes this great! They did this on purpose...just like making us wait through the credits. They knew the masses would leave. It is a win -win for everyone. If they want to do something later they can with the story. Brilliant!