I am just starting out with using Vassal and the Operation Mercury module so I may have missed something but I believe there is an issue with the Scenario 1 German scenario card. Stick 2 that lands within 1 hex of 33.14 is missing the 12./III./FJR 2 piece. It is available in the Markers/Units Tab but it has a green stripe rather than pink.
I also want to say what a great job was done on the module - as I get the hang of it, it seems to be better than the physical game itself!