Per the Grand Jury Presentment (2010): McQueary reported that he saw: 'fondling or doing something of a sexual nature to a young boy'
[language of Grand Jury presentment, p.7]
#1: So your "wasn't clear about what he saw" is perhaps a distinction of sodomy/rape vs. "fondling" or other sexual abuse.
#2: Remember that some of the jury that convicted Sandusky were diehard Nittany Lion fans. So, of course, they would vote for a "not guilty" on the one charge that was closest to the dagger of the heart of Penn State and Paterno. They wanted Sandusky properly "hung"; but they wanted the controversy to be as straight-armed as possible away from Penn State/Paterno.
By the way, do some homework before you make a fool of yourself again. Start by reading post #26, re: “Victim #2 - the boy in the shower”.