Stuff happens OP. Without further information it is hard to say if this is indicative of how the company might be to work with.
+1 1 hour is no big deal in my opinion, but I'm a pretty go with the flow type of person. A few years ago, someone was interviewing me from Asia, and we set up a time to talk that was 11 p.m. DC. He sent me a message that he had gotten delayed. I went to sleep thinking that was it for the night, and at 2 a.m. the man called me and groggily I did the interview. It makes for a funny story a few years later.