Costco Wholesale interview questions

Received a call asking if I was interested in the position I applied for (cake decorator). Called back to schedule interview but didn't receive a response for a week. Finally got a call and had interview scheduled. Arrived 20 minutes prior but waited almost two hours? Then, the manager tells me that I wasn't being hired as a cake decorator but as an "open seasonal" employee, unloading trucks or working the front and possibly "closing" the bakery because they "promote from within" and heck, that was even if they kept me past December. It was rather insulting because that wasn't what I was told by the bakery manager on the phone, nor was it what I applied for. Keep in mind, I'm a trained and seasoned cake decorator with a portfolio (with culinary school to boot). Any way, the manager proceeded to tell me that he was going to ask me questions (behavior related, I assume) but I had such a distaste in my mouth from waiting two hours and then being told that I wasn't being hired for what I applied for, that I actually ended the interview. Never had to do anything like that before in my life. Complete joke and waste of time.

Interview process was straight forward. They have set interview questions they seem to ask every candidate. Most of the questions were behavioral. The question they seem to like asking however is "how did you study for this interview?"