I recently did a project with moving text. I had problems getting the text to not creep up or down after the move was over. I used "throw" as a behavior. I set a keyframe to begin and an end keyframe at the final position. It reached the final position, but seemed to creep back, very slowly, toward the first keyframe. What am I doing wrong?
You said that you used the throw behavior, but also that you used keyframes. Which is it? There is no need to use keyframes with the throw behavior since it's very nature is to move an object. Don't use keyframes at all. Simply adjust the beginning and end of your throw to determine where it starts and stops and adjust the velocity. That's all there is to that behavior.