Creating a jumping animation with motion tween?

Hello!

I want to make this character jump over the set of stones:

This is the last keyfrome before initiating the jumping animation. All parts of the character are on seperate layers for left leg, right leg, body, left arm, right arm and head. at first i want to decrease the height of the legs. But when i make it, the hole animation before looks like this:

So there seems to be a problem with the left leg and i don't know how to solve it.

The result of all should be that the character goes down and get the momentum to jump over the stones.

Please ask if there are more information required, so we can specify the situation.

Best regards!