I entered JZ Roggenbier recipe into BeerSmith, and it calculated way to high OG. I suspect that Rye Malt Grain Yield is set too high it this program - 81 %? same as Pils? What should be the correct value - 70%?
Unfortunately, it's not very often we homebrewers can get a hold of run data. You might be able to get somewhere with your LHBS. Sometimes, my guy can get a batch analysis..