You Tubing Swimming

I don't know who or what teams these You Tube videos are of but they are from the swimming during the Chicago Gay Games.  The problem with swimming at this end of the pool was that the T painted in the bottom of the water dips as the bulk head splitting the 50 meter pool into two 25 meter pools is at the beginining of the deep end.  So when you are swimming and approaching the flip turn you have an optical illusion that you are closer to the bulk head then you actually are.  Here are the videos try and watch the starts, turns and streamlines...