Well done, if the hours aren't suitable at least you now know you can do interviews and that you didn't mess up when you thought you did. My mum did the same, she had an interview a while back and didn't get the job but they did tell her it was between her and the other lady and that she did nothing wrong it was just the other lady had loads of experience (30 years) they've sinced moved her to another kitchen temporarily until they fill the position. She has an interview for that tomorrow and she keeps panicking about it, so yesterday I just told her, remember what they said about the last interview and then I asked her what she'd say to me if I was worrying about an interview. You seem to be very good at giving advice yourself, so next time you have an interview and worry about it try and take yourself out of the situation and imagine someone else has just told you they have whatever feelings your having about it, what advice would you give them?
Sorry I don't know if that made sense or if I was just rambling, but I know what I'm trying to say...