I believe the protect sleeper was used on CAPITOL LIMITED #29 last Sat. due to one the Superliner sleepers having been bad-ordered. Fortunately the consist had a transition dorm so the Viewliner was placed ahead of the Supers. This is the first instance I am aware of for a low level car to be placed in revenue service with Superliners.
As to the CRESCENT, I continue read about high dwell times at NS' Norris Yard (Birmingham), which implies that trains being held out of the yard are probably contributing to delays on 19 & 20. Have never been able to figure out why the Meridian-Tuscaloosa segment has been such problem for these trains.
I thought for sure you were mistaken, but...I just checked the consist for 29(22), and you're right! Viewliner 62005 was ahead of transdorm 39044, and the bad ordered sleeper 32112 brought up the rear of the train. The Viewliner deadheaded back in the same position on 30(24).
I'll bet it was interesting re-booking from one to the other, given the difference in room configurations and quantity. I know some folks leaving ATL several months ago who were re-booked from sleeper to BC coach account a bad ordered sleeper on 20. They were told ahead of time and refunded the fare difference.
It was done back in the 1980s. You know, I would have very much enjoyed a Viewliner room on the Cap, given the choice.