Given Shama's closeness to Baba, why was he not assigned the task of reading the sacred books in the Wada?

The passages from Chapter 18 clearly state that Sai Baba assigned the duty of conducting daily readings in the Wada to Bapusaheb Jog. The text details how Jog would read 'Jnaneshwari' and 'Nath Bhagawat' after receiving Baba's permission each day. While Shama, or Madhavrao, is a key figure mentioned in this chapter, his role in the narrative is different. Baba sends a messenger to him to request fifteen rupees as Dakshina, leading to a different kind of interaction. The source material does not provide a reason why Shama was not chosen for the reading assignment; it only specifies that this particular seva was given to Jog.