Beer52 interview questions

Started positively with a phone call, then a face to face interview. Everyone was very friendly and enthusiastic. I was told I'd be informed about the next stage at the end of the week. Radio silence. Contacted them myself the next week to ask for an update only to be told that the job had now been changed and I was no longer in the running, despite apparently being the preferred candidate up until that point. The explanation didn't really make sense.