Hi Ben,

1/ I noticed that there are PROXY objects in your drawing from Civil 3D:

2/ There is something wrong with UCS in the drawing you shared and I believe in all other drawings with this problem.

Look:

If I set UCS icon to display at origin (command UCSICON with ORigin option) in your drawing I get the following:

- UCS icon (1) is faded for some reason. In all other drawings it appears clearly.

- Plus - UCS icon has a shape of WCS with small square at origin point, despite the fact that the current one is UCS (2)

- Plus - UCS icon is not displayed at the origin of UCS, if you draw line from 0,0 of the current UCS the first point of this line will be at a position marked with 3 on my screenshot.