I was curious as to why Burnside only crossed with a couple of units which exposed them to being surrounded. That seemed like a really bad scripting. Taking a peek at the actual scenario answered the question. Burnside's Corps isn't released until 8 AM. What crossed was a couple of units that the Rebel units triggered the release of because they got to close to them. Script kicked in and they made a suicide charge. Scripts will force units to move but won't make them any smarter once they get in contact.
I was curious as to why Burnside only crossed with a couple of units which exposed them to being surrounded. That seemed like a really bad scripting. Taking a peek at the actual scenario answered the question. Burnside's Corps isn't released until 8 AM. What crossed was a couple of units that the Rebel units triggered the release of because they got to close to them. Script kicked in and they made a suicide charge. Scripts will force units to move but won't make them any smarter once they get in contact.
Maybe Burnsides troops can walk on water in this scenario, but they are still stupid.