Carol, I don't know if that transcription error occurred when Ed transcribed the records of the company, or when it was posted. However, my own transcription of the Compiled Service Records lists the name as George D. Davis.
John and Wallace Davis were original members of (old) Co. F, which was recruited in Yell County and vicinity, and was mustered into service on July 4, 1862. When the regiment was reorganized on December 16, 1862, the company was redesignated at (new) Co. B. George D. Davis was recruited when a recruiting detail was sent back home, but wasn't mustered into service until he reached the regiment's camp near Camden, Arkansas, on November 20, 1863.
All three men reportedly left the regiment's winter quarters without authority on January 16, 1864. Wallace and John subsequently enlisted in Co. C, 4th Arkansas Cavalry, U.S. Volunteers, at Dardanelle, on February 3, 1864. I suspect that they joined the Union regiment under duress, because they deserted at the first opportunity. Based on the pension application of George D. Davis, he (and possibly John and Wallace) apparently returned to duty with Hawthorn's regiment, though there are no later muster rolls to confirm it.
Celia Elizabeth Davis, the widow of Wallace Parks Davis, applied for a Confederate pension from Erath County, Texas. Is this the same Wallace P. Davis that we've been talking about?