Ronster said:

The first close up shot of leia shooting has 3 troopers and none of them step over anyone the first trooper get's shot? The trooper stepping over dead one in chewies area is correct nothing wrong with it.

Check it again. this is the first close-up we see of the stormtroopers getting shot and it's leia doing the shooting> keep you eye on the stormtooper i've marked with the arrow.

You can plainly see he is stepping over the body of the stormtrooper that doesn't die until Chewie shoots him later.