Markel interview questions

Completed 1st interview with recruiter on a Tuesday. Felt it went well all things considered. He says he feels I'd be a great fit and he wanted to schedule a 2nd interview that Thursday. Thursday comes and I've heard nothing, so I reach out. Out of office Wednesday - Friday. Okay no problem, probably just an oversight. Circle back on Monday when he is set to return but no response. 1 week later get a rejection email. Felt pretty unprofessional. Why give a specific day for a 2nd round interview if you have no intention of interviewing me? Why can't we be honest with candidates?