Why did Dev feel that Sai Baba had deceived him after the Udyapan, and how was his misunderstanding resolved?

Dev felt deceived because he had invited Baba to his Udyapan ceremony and, not seeing Baba arrive from Shirdi as expected, believed Baba had broken his promise. As detailed in Chapter 40, Dev wrote a letter to his friend Jog expressing his disappointment and confusion. The text states Dev wrote, "He told me, who had sought refuge, 'I am coming.' But it all turned out otherwise." The misunderstanding was resolved when Jog presented this letter to Sai Baba. Baba then revealed that he had indeed attended in the form of a Sanyasi with two companions, a fact Dev had missed. Jog relayed this explanation back to Dev in a detailed letter, which caused Dev to feel immense regret for doubting Baba and failing to recognize him.