I have been pouring over OR info and have determined that there are definately flags lost by Missouri Troops. The only question is how many, 1 or 2.
LTC Heath states early that "about 350 prisoners, mainly of the 7th and 10th MO, their officers and colors taken between Bttry C and Ft Curtis. Later in his report he changes to the fighting around Bttry D and states that one stand of colors was taken (the one he mentions in his letter to Merchants Union)
COL Mackey states that at Bttry D his troops took several hundred prisoners and 2 stand of colors (those in Iowa)
I think this pretty much solidifies that a flag or flags were taken down in town in vicinity of Ft Curtis