Are you sure you put the limits in the right place?
I did that, with no other parameters. I got 784 scenarios, including 21 from Black Panthers and Elsenborn Ridge.
Black Panthers: 01. First Contact
Black Panthers: 07. Koecking Ridge
Black Panthers: 11. Disaster at Honskirch
Black Panthers: 12. Champagne Breakfast
Black Panthers: 14. Wooden Walls
Black Panthers: 19. The Last Bridgehead
Black Panthers: 20. First Brewed
Black Panthers: 23. Delay at Kamperbrűck
Elsenborn Ridge: 01. Autumn Mist
Elsenborn Ridge: 06. Twin Villages: The First Night
Elsenborn Ridge: 07. Twin Villages: Valor and Sacrifice
Elsenborn Ridge: 08. Twin Villages: Panzer Graveyard
Elsenborn Ridge: 09. St. Vith: First Probe
Elsenborn Ridge: 12. Twin Villages: Finale
Elsenborn Ridge: 13. Crossroads: We Fight and Die Here
Elsenborn Ridge: 16. Crossroads: Hunting Panthers
Elsenborn Ridge: 17. Crossroads: Panzer Attack
Elsenborn Ridge: 20. Night of the Long Knives
Elsenborn Ridge: 21. Crossroads: The Last Gasp
Elsenborn Ridge: 29. The Small Solution
Elsenborn Ridge: 31. The Sad Sack Affair