Rob Bozeman, yesterdays leader of the Olson 30 class, started the day with a win but stumbled in the next, finishing fourth and then fourth again in the classs third race. I dont know what happened, says Bozeman. We just got stuck in a rut. As Bozeman dropped to second in the overall standings, Mike McGagh of League City, Tex., waltzed in with 1-2-1 finishes for a 2-point lead. The lead changed hands in the Hobie 33 class as well, with skipper Juan Mauri of Dallas, Tex., demonstrating his teams heavy-air prowess. They dominated the nine-boat fleet with a 2-1-1, building a 3-point lead over Chris Schaumioffel of Virginia Beach, Va.