Good Q
@FarawayFriend Lots of interpretation involved in answering this question.

After considering the titles and meanings of the titles, I am going with the following as my "final answer." And, although I may regret it,

no I did not "phone a friend."
True, at the time of the Battle of Atlanta, Lee was was the Commander-in-chief of the Confederate Army
of Northern Virginia but he was not Commander-in-chief of the Confederate Army
of Tennessee that was engaged at Atlanta.
In July 1864, Lee was the Commander-in-chief of the Confederate Army
of Northern Virginia.
During the Battle of Atlanta, John Bell Hood was the recently appointed Commander-in-chief of the Confederate Army
of Tennessee (Western Theater,) replacing Joe Johnston.
http://historicaltextarchive.com/sections.php?action=read&artid=660
Confederate President, Jefferson Davis, performed many of the responsibilities of a general-in-chief himself, acting as both a military operations manager and commander-in-chief. It was not until Feb 6 1865 when Adjutant and Inspector General Samuel Cooper issued General Orders #3, that Lee would be appointed "General-in-chief" of the (entire) Confederate Army .
wikipedia wiki/General-in-Chief_of_the_Confederate_States_Army
Edit - The interpretation that was intended was whether Lee was the commander of the entire Confederate army. All the other players interpreted it that way.
Hoosier