My miche BB also makes weird noises. At first I was freaked out when I heard it (I did the same thing as you. took it out, inspected, greased and reinstalled at proper torque.) After doing this a few times I figured I had a lemon so I bought a new one because they are ao cheap. I Installed the new one and I had similar noises coming from it, but I've been using it problem free for 6 months. I'm thinking about replacing it with a Phil BB because even if the noises are normal, they still bother me.

To clarify- the noise I hear is more of a groaning noise not a "clunk" as you described