Hello Phil, From what I interpret some of the companies in the 1st Regiment, Local Defense Troops also known as the Light Duty Troops were later known as the 2nd Battalion, Local Defense Troops. For example look at page ten in the unit history of the 1st Regiment and it says Company G 1st Regiment LD Troops afterward became known as Company D 2nd Battalion LD Troops.
In my opinion what you are seeing is the same dog by a different name.