Was Kashiram following Maharaj's orders when he killed two robbers?

No, the texts do not indicate that Kashiram was acting on any orders from Maharaj when he fought with robbers. The account in Chapter 0 describes an incident where Kashiram was attacked by Bhil robbers while returning from a market. The robbers attempted to take a small bundle that Kashiram was carrying. This bundle, containing powdered sugar for feeding ants as advised by another saint, was very dear to him. In the ensuing struggle to protect it, a thief dropped his sword, which Kashiram picked up and used to kill two of the assailants. This was an act of defense, not one commanded by Maharaj.