Include Truck or Lane Load on Approach when Auto Generating Live Load

I am using the Substructure module of LEAP Bridge Concrete. 

According to AASHTO LRFD, you can't have a truck on both the approach slab and on the deck, but you can have a lane load on both.  

When generating live loads for an abutment, there are two check boxes to include live loads on an approach slab. One box is for truck loads and one box is for lane loads.

When I click either of the boxes for truck or lane load, i would expect it to create a force and moment under the "Cap/Stem Loads" for at least some of the auto generated live loads, but it doesn't seem to. When I auto generate a future wearing surface load using DW on the approach slab, it does create a force and moment under the "Cap/Stem Loads."

I am wondering if the boxes for the truck and lane load on the approach slab are working at all and if so how can i tell?. I am also wondering if by clicking the button for the truck load on the approach slab, will it make sure that there isn't a truck load on the deck for the same auto generated live load case?

Thanks,

Rob