According to Scripture there is only one Rock upon which the Church is built.
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Of course one as familiar with the Catechism as you didn't miss the following:
552 Simon Peter holds the first place in the college of the Twelve; (283) Jesus entrusted a unique mission to him. Through a revelation from the Father, Peter had confessed: "You are the Christ, the Son of the living God." Our Lord then declared to him: "You are Peter, and on this rock I will build my Church, and the gates of Hades will not prevail against it." (284) Christ, the "living Stone", (285) thus assures his Church, built on Peter, of victory over the powers of death. Because of the faith he confessed Peter will remain the unshakeable rock of the Church. His mission will be to keep this faith from every lapse and to strengthen his brothers in it. (286)
I'm not surprised that you might be confused by the choice of words in the three seperate Paragraphs. If all else fails, try Scripture.
Reggie, no one is arguing that every reference to rock in the Bible is referring to Peter. Talk about strawmen!
What about the above is unclear to you? Peter will remain the unshakeable rock of the Church. And the Church is "built on Peter."
According to Scripture there is only one Rock upon which the Church is built.
You spelled "Reggie" wrong. According to Reggie, there is only....
SD