When I arrived at the gate of my flight departing SFO to MIA earlier this week the board at the gate showed I was number 1 on the list and my upgrade had cleared. I was surprised as my current status is merely Gold and had not received any email from AA. I walked over to the GA and asked if the cleared status was true. She fumbled about and said it was an error and that an AA employee with the same first initial and first three letters of their last name had cleared. Plus, everyone in F had checked in and it is full. EF was showing 2 seats available for upgrade. When I boarded a different GA looked at my name and said wait a second. I said the board is showing I cleared. What is the issue? He said there had been issues with the board and it has been a problem. He went to talk to the first GA. He came back and said to board. I settled into 11J on the 763 and enjoyed my flight home. Has anyone else encountered this type of situation where there is this disparity and GA's who act as if they are being less than honest?