What you linked was the Grand Jury Presentment and not Joe Paterno's testimony. The Presentment contains only truncated parts of the testimony. You may find a transcript of Paterno's seven-minute testimony here.
As for my statement that Paterno knew that McQueary had witnessed something sexual, I'd point you to this part of Paterno's testimony:
Q: I think you used the term fondling. Is that the term that you used?Mr. Paterno: Well, I don’t know what you would call it. Obviously, he was doing something with the youngster. It was a sexual nature.
As for Paterno's testimony that Curley was he only person to whom he talked about what McQueary had said:
Q: To whom or with whom did you share the information that McQueary had given you?Mr. Paterno: I talked to my immediate boss, our athletic director.
Q: What is that person’s name?
Mr. Paterno: Tim Curley.
Q: How did you contact Mr. Curley?
Mr. Paterno: I believe I did it by phone. As I recall, I called him and I said, hey, we got a problem, and I explained the problem to him.
Notice no reference to talking with any other party.
The fact that Paterno was clearly stating the Curley was the only person to whom he spoke is amplified by the subsequent exchange:
Q: You indicated that your report was made directly to Tim Curley. Do you know of that report being made to anyone else that was a university official?So Paterno is testifying under oath that he didn't know that Schultz knew about the Sandusky shower incident.Mr. Paterno: No, because I figured that Tim would handle it appropriately.
And you're mixed up about "McQueary who said the opposite the next day to his doctor." The doctor was Jonathan Dranov, M.D. John McQueary, Mike's father, called Dranov to the McQueary household the night of the incident to help them decide what to do. Dranov, the medical director of a clinic to which Sue and Joe Paterno had donated over $1 million, advised Mike to talk to Paterno rather than to call the police.
At trial, Dranov testified for the defense. However, he didn't say that Mike told him he didn't see anything sexual. He testified that the asked Mike three times whether Mike saw actual sexual penetration and that each time, Mike would start describing the experience, and when he got to the rhythmic slapping sounds, he would break down and couldn't continue discussing what he saw. Dranov said he had known Mike since he was a boy and had never seen him break down before.
So McQueary never told Dranov he saw sexual penetration - but he never told him he didn't.
Q: You indicated that your report was made directly to Tim Curley. Do you know of that report being made to anyone else that was a university official?
Mr. Paterno: No, because I figured that Tim would handle it appropriately.
So then why is that perjury??? He's saying that he didn't make that report to anyone else but Tim Curley who he expected to do the right thing with it.
It turns out that Curley, Schultz, and McQueary met a week or so later. So then Schultz finds out but not from Paterno. Who is to say that Paterno was privy to that meeting or knew what was said at it. He wasn't there. The report that Curley and Schultz acted upon was the report that was given at that meeting with the three of them.