You need to put each one of those tweens into its own MovieClip. So your main timeline will only have one frame with those four MovieClips.
To address each individual MovieClip, you need to give them instance names (select the clip on the stage and give it an instance name in the Properties panel).
Then you can do rollLeft.stop();
, or backFlip,play();
, or rollRight.gotoAndPlay(5);
, etc.