David,
The best reference for what constituted a Color Guard can be
found in Hardee's Tactics. I believe a synopsis of this work can
be found on the website Confederate Flags .org. This work in no way
described what happened in the field or on the battleground.
National and State flags were restricted to parades and camp activities.
However, some units did indeed carry flags other than the "battleflag" on
to the filed of conflict. This was relatively rare. A handful of cases do stand out.
The "parade-ground" color guard consisted of 8 corporals and one sergeant (bearer)
As the war progressed and the soldiers discovered that the position of Color Guard
was not only a "Post of Honor" but also a "Place of Danger" it became more and more difficult to
fill these positions. The numbers diminished as the war continued. I have found that the
Color Guard varied from battle to battle on a voluntary basis for the most part.
Confederate companies for the most part did not carry guidons. Some retained their
company flags but these (as stated before) were restricted to parades and camp activities.
What regimental adjutant requisition did you find? A stand of colors usually means one flag.

What prompts the interest?

Ken Legendre