Hello Brian,
the mentioned dataset doesn’t have georeferenced information or XMP data. That means, that each alignment and therefore model orientation will be slightly different (even in the same version).
Have you used the same project in 1.5.1 and 2.0.1 version or have you created a new project in each version? Or have you used XMP workflow, component workflow or GCP workflow between the versions?
If not, a slight difference in orientation or position is expected.