I could understand where this may hold true for men who died on day two at Shiloh, but would those who died on day one stiil be listed in this manner ?

See the regimental history below, at the end of which is a death roll (almost certainly incomplete). Pay particular attention to Company I & their Shiloh casualties:

http://genealogytrails.com/tenn/madison/milcivil6.html

Thanks,

D. Williams