After effects - Circle to Heart Shape Morph

Hi their,

i am currently trying to animate a circle to a heart in after effects.

I have created the shape layer for the circle and imported the heart shape from illustrator and changed it to vector shape. Then got the bezier path key frames and added them to the circle time line but the shapes seam to move over the screen and change in size when they morph.

can anyone suggest what else I could try?

Thanks.

ps. if you need anymore information let me know and i can provide it