Classic tween automatically ads symbols in library

Hi,

I have just started using Flash CS5 recently and have a question about the classic tween. I have noticed that when I make a classic tween Flash automatically makes symbols out of my grouped objects.
I have worked with previous versions and it was sufficient to just group my objects on the stage to make a tween.
Is there a way to turn this feature off? I’m an animator and it’s very annoying and messy to make a symbol out of all the objects I want to animate.

Does anybody know how to solve this? Thanks.