There physically isn't a way for either shift action to in fact move but not engage (shift) without something being either bent, broken or missing. I'd suggest that the case be dropped and inspected. At a minimum, pull the top cover and inspect the hi-low shift linkage, fork and sleeve. Also pull the 4WD linkage and inspect the 2-4WD fork, sleeve and shafts. They are extremely straightforward and while there are numerous tricks to make them work better, you should at a minimum be able to see why it isn't shifting. Totally shooting from the hip but I'm suspecting this is an external linkage issue, perhaps as a result of a super tight shift detent on the Orion, possibly bent a linkage or fork?
U4WDA, Wasatch Cruisers, TLCA, RR4W, Mountain Yoats 4x4