I believe that the Union OOB might be a little messed up in this one --- JL Reno as IX Corps commander is not being used - only JL Reno as 2nd Division commander of IX Corps - with the upshot that BG Isaac Stevens is shown as IX Corps commander -and there is no divisional commander of the Union IX Corps.
I am not sure if this is messed up in the 2nd Bull Run scenarios as the IX Corps enters as reinforcements - I guess I could edit the scenario and advance the turns to a point where they'd have entered (and keeping in good practice --save the file as a differently named file from the stock).
But -the absence of a divisional commander is a reasonably significant deal. Reno being on the map in his divisional only capacity is probably wrong. Although I don't entirely know what you do about commanders with dual responsibilities. And I only noticed it because I knew that Stevens was KIA'd in this action (and he was married to a distant cousin). I think he was also the first territorial governor of what would eventually become Washington state (or one of the first).
https://www.battlefields.org/learn/maps ... 400-515-pm