Another counter problem AS3

I set this game level so the player can replay the level but there is a penalty of -30 points  each time the player replay the level. Also I set the replay to forget the accumulated points of that level. Somehow the two statements conflict with one another and each time the player replay the level the negative points multiple. for example on the first replay it would penalize the player with -30 points as it should  but on the second try it would penalize  the player with -60 points and on the third -90 points. each formula works great on it's own but not when I put them together. I tried everything and can't figure it out . please help

Here is the script:

playLevelAgain.addEventListener(MouseEvent.CLICK, doLevelAgain5);

function doLevelAgain5(event: MouseEvent): void {

// -30 points penalty for replaying the level

score -= 30;

// resting the points to the original point level.

score -= ScoreScene6;

gotoAndPlay(1);