Flags are not a strong point of mine but I would think that a new flag was issued without reference to individual regiments. It must be remembered that by the time all these regiments were consolidated under the command of Brig. Gen. Zebulon York, their ranks had been much depleted and the numbers of a Brigade were probably less that that of 1 regiment in the previous times. An example is all the Virginia regiments of Johnson's late division were consolidated under the command of William Terry. This brigade was made up of the remnants of 14 regiments.I have read correspondence of soldiers of these regiments and they too were dismayed at the loss of their regimental identity. In August, 1864 The units of Early's command were inspected. The inspecting officer, Major Moore, noted" Strange officers command strange troops, and difficulties of fusing this incongrous mass are enhanced by constant marching and frequent engagements".
Another officer stated "...The troops of the old organizations feel that they have lost their identity, and are without the chance of perpetuating the distinct and separate history of which they once were so proud. This loss of prestige must excite to some extent a feeling of discontent, but it is still grsatifying to know that the men and officers still fight with conspicuous gallantry and constant success".
These remarks would apply as well to York's Brigade. The flag used was, as stated before, probably a brigade flag with no unit distinctions.