Yes I concur with all of those who say that this is not a war date product. A couple of things stand out to me, the braid on the sleeve is cotton, Southern kepis and coats are almost exclusively metal braid. US coats and kepis the same, but there are very few instances of late war gold, red and blue cotton braid on US headgear. The stars are so amateurishly sewn, most likely on purpose to add some supposed realism. I do not think they are original to the coat, someone of that rank would grab one of the company tailors, usually a man in the ranks whose civilian job was that of a tailor and have them sewn in minutes. A very simple whip stitch is almost invisible and an experienced tailor would have them sewn on in less than 5 minutes.
I suggest that this is a late 1800's military school jacket that may have been utilized as a reunion or even early reenactment piece.