Hi Kevin,
Each of the units settings- Length , Area , Volume - can be set independently. Change in unit for length will not automatically change the Volume units. Hence the case of second screenshot (Volume BUG.02.JPG) is the expected behavior.
I do agree that the case of first screenshot (Volume BUG.01.JPG) - should have shown the volume in cu.yd (in line with the Units settings). We are working on a new 3D app which should address this issue. We will keep you posted on the same.
However , in the mean time can you please report details of the project to our support team (connect-support@trimble.com) , so that we can track this to closure.
Regards
Darshan