Ouch, I don't know that you are overthinking or that it's too early. I think your post title pretty much nails it, you aren't on the same wavelength (at least for that conversation). Maybe he just takes longer to warm up? It's really hard to say. I'm with you, the talk about moving in together, the promise ring, all of that stuff doesn't really match up with you *not* being the one... so maybe he meant something different from what you heard?

Do you think you could talk to him about 'the one' conversation you had?