You need to have them tack some 2x4s or whatever thickness/dimension is needed to support each section of the step bottom perfectly.
You can bevel the forward section of each step of the wood down at a 30-45 degree angle. This will alleviate the fork truck from catching the step on the stepped bunks when removing the boat from the rack.
Anything less WILL damage the aft of the steps and worse over time. I guarantee it.