From other posts, I think that the locomotives are able to MU through the consist. The train is so small that only one unit is needed at a time, and so I suspect that it is cheaper to keep the second unit dead in tow than it is to find somewhere to turn the train.
Absolutely non-germane to the Hoosier State–but…
When I rode THE Capitol Limited in 1968, I asked for a coach ticket to Baltimore (it cost no more that a ticket to Washington), and a single slumberroom to Washington. It took the ticket seller in Grand Central a little while (with my attempting to explain the request to him) to comprehend what I wanted.