I pointed out a parallel grant of authority and asked an obvious question which you ignored. I'm thinking there is a very good and obvious reason that you are avoiding Matthew 18.
Since I'm at work and don't have a Bible to see what "Matthew 18" says (you "do" realize that "Matthew 18" is a CHAPTER, and not a verse??), I assume you're referring to the later grant to the Apostles as a group of the "power to bind and loose". This later grant does NOT include the authority of the "keys of heaven" or keys of stewardship which was granted to Peter alone, and is that grant of authority that the notion of "popehood" was based on. That, plus the direct evidence from Scripture that Peter indeed was considered, and acted as, the leader of the Apostles, and that his successors were so considered from the very beginning of Christianity.