Next time try the alcohol slide to get it back in place.
Wet the bonded area in the crown with some alcohol to loosen the bond, then place both your hands on the area, press down a bit then slide it over to where you want it. Hold it there for a minute until the bond rehardens.
You might as well stretch it back a little too, the should help pull the front back at least enough to get it from looking too far forwards.