I just picked up this mod yesterday, and ran into a few issues...

The pallet shed is supposed to take a fillType of "BOARDS", but it does not accept the Planks produced by the Wood Mizer (a "BOARDS" type). I was able to confirm the unloadTrigger on the pallet shed as the culprit. It should look similar to the one under woodshopSmall.xml, i.e.:

<unloadTrigger exactFillRootNode="unloadTrigger" fillTypes="NAILS BOARDS" />

Additionally, the Platinum Expansion fillType for Wood Beams is "WOODBEAM", but the pallet company and woodshop shed both utilize the custom "BEAMS" fillType from your mod, which makes them incompatible with the Wood Beams produced by standard Platinum DLC sawmills, like the Wood Mizer. Those should probably be updated to accept standard Platinum DLC fillTypes so they can be compatible with other mills.