The 57th Massachusetts, on my list of captured CS flags, took the flag of the 5th North Carolina at Ft. Stedman. The ID of the 57th NC might be for this flag instead.
Also - the 100th Pennsylvania took a fourth flag at Stedman according to what I have - WD 270.
I also have the 110th PA taking a flag there - WD 264
I also have the 205th PA taking a flag there.
Greg Biggs