Need help with my platform animation

Hello, when I make my character walks in works but when I want to make a specific actions like

Press : left

Press : right

but then release the left button my character make some "Moonwalk" like in this gif

Here is the script :

Try replacing the bottom events with 'left button is down' and 'right button is down'

Thanks it seems to work !

Thanks lions, it works just fine now.