First, don't mix solid with the physic-behavior that can cause sideeffects.
You don't have to move the objects yourself, the physic-behavior will do that for you.
Set in the Physic-Properties immovable to yes for platform_1 and no for sprite5.
Change the 10. event to:
lever_1| Is active - > platform_1| Set Physics Movable
lever_1| set animation frame to 1[/code:2nxsyxi1]
Now it should work.