I bought Billy Joel tickets two weeks before the event. Two days after my purchase, I receive an email saying that my tickets were ready to print. When I printed them I noticed that they were not the Club Seats I originaly purchased. I called Stubhub and they told me that they upgraded my seats since the others were not available. Their meaning of upgrade is that the new ones were $10 more expensive. I told them, these are not club seats and that I didn't think they were an upgrade. They just didn't care and told that they were an upgrade. After getting to the event, they were definitely NOT an upgrade. They'll just do what they want.
Be careful