Why was Dev so upset and confused after his Udyapan ceremony, even though he had invited Baba?

Dev was upset because he believed Sai Baba had broken His promise to attend the Udyapan ceremony meal. As detailed in Chapter 40, Dev had pleaded with Baba to come, and Baba had assured him, "I am coming." When the ceremony concluded and Dev had not perceived Baba's presence in a recognizable form, he felt deeply disappointed and deceived. He wrote a letter to his friend Jog, expressing his confusion and feeling that Baba's words had "turned out otherwise." Dev had waited with great anticipation for some sign or experience of Baba's arrival, but because he failed to recognize Baba in the guise of a Sanyasi, he concluded that the promise was unfulfilled, leading to his distress.