OK - this now makes sense to me. The 43rd Indiana were to the Confederate rear and away from their color guard most likely, who then surrendered to the 33rd Iowa.
I noted how one report said one stand of colors and the other two.
The 33rd Missouri also took a flag and sent it to St. Louis as a trophy - I forget offhand what unit - maybe Hawthorne's?
I wish we could really work over the Helena captures too.
Thanks for the fine help - sure hope this finds your health doing much better.