Those are all witnesses I have not heard of. I have read there were only three including Zimmerman. I know at least two who have said Martin was on top beating zimmerman.
At least three witnesses: Mary Cutcher, Selma Mora Lamilla, and the guy on this audio claim that Martin was lying face-down on the ground and Zimmerman was on top of him.
http://globalgrind.com/news/anonymous-eye-witness-trayvon-martin-shooting-breaks-silence-video