I inadvertently clicked the wrong tee time box when making a reservation. Upon confirmation, I realized the time was two hours later than I wanted. I immediately called the toll free number to correct the tee time. The teeoff agent told me that he would correct the issue, and would do so without cancellation penalty. He then made the corrected tee time, but charged me $2.00 for the cancellation and did not apply my promo code, because I had used it in the first (erroneous) reservation. Bottom line: I paid full price plus $2.00 for hitting the wrong tee time box. Be very careful when making reservations using teeoff.com.