Soldiers win WWII or any other war who filled those roles were, at the end of the day, soldiers. Enlisted as such, treated as such, and paid as such. Blacks who filled these roles for the rebel army had no legal status and were not considered soldiers at all. Not until 1863, when blacks were authorized to be enlisted as musicians, or 1864, when blacks were authorized to be enlisted as laborers working on fortifications and military construction, did they achieve any official standing. And, of course, March 1865 when they were finally authorized as combat soldiers.
We are getting off track of the original contention of the article, which was they wanted the section in the text regarding black CSA soldiers removed because they contend it is false.
It is not "false" per se, but rather makes what may be a contentious claim as to the number.
The statement: "African Americans served in uniform on the side of the CSA."
Is a true statement, as you have now acknowledged.