Actually, I'm not confusing them, PG is. What I advocate is having a single leader, and whether you call employees 2-4 "co-founders" or not, they all know who is boss.
PG thinks that you have to have consensus and multiple founders all with an equal say. Thus, multiple leaders.
The whole cofounder thing has taken on quite a weird perspective-- I think because PG doesn't have much experience with it, but is adamant, and most of his readers have never worked for a startup, let alone started one, so they believe he's preaching the gospel.