Having said that I did find in the newspapers of Columbus a list for the Confederates being brought to Columbus, ie Camp Chase. Neither man was listed in that newspaper article. I have not yet looked for any additional soldiers from the 51st Va. Militia ie their CMSR's. They may have been captured in the Shenandoah Valley since the 51st VA. Militia did hail from Fredrick County VA.
As of right now it is just a curious condition that these two officers are reported as taken as prisoners at Fort Donelson. It very well could be a mistake. However since the 51st VA Militia has an incomplete history of their unit I think further research into other soldiers of the 51st VA Militia is called for especially for Companies C and D.