To my knowledge there were several regiments from North and South Carolina which where added to the ANV after that time.
There were bad relationship between Richmond and the states of the Trans-Mississippi Department after those states were abandoned Earl Van Dorn and the entire army in that department were transferred to the A.O.T. Most of the Staes like Texas Arkansas and Missouri figured that they had contributed their share of troops to the eastern war and that they deserved to be protected also.
From dispatches between the Confederate Sec. of War Randolph and Gen Theo, Holmes who commanded the department there was much discussion about raising these 7 regiments and who would be transferred east of the Mississippi river in late 1862. In November of 1862 the regiments which were at Arkansas Post were actually ordered to move in responce to this request as soon as troops to replaced them could be arranged. However the battle of Arkansas Post happened and these troops were captured and sent to Camp Douglas Prison.
They were exchanged at City Point, Virginia rather than the usual exchange point of Vicksburg or Little Rock, AR., because Grant didn't want these troops to be reenforcements for Vicksburg. The popular stories are that these Texas troops were then not wanted by authorities in Richmond because of the contriversey over the surrender of Arkansas Post. That seems childish to me when reenforcements were so badly needed in Virginia and IF these men were supposed to be sent to Virginia in the first place. It seems like the prisoner exchange would have had the same effect as the original order/request for 7 additional regiments. Yet these men were eventually transferred to the Army of Tennesee. WHY?