Ex broke NC - WTF?

It's been a week since he dumped me. I haven't reached out at all. He messaged me Thursday for my address so he could mail my things back to me. I told him to keep/donate anything that's there. No response from him.

Yesterday evening around 5:30 he sent me a message about a joint hobby we have. We chatted about that off and on for a couple hours. Then he sends a message that says "Are you still so mad at me?" The next couple messages he sends to me are about how he's mad at me for only being in the relationship for sex.

WTF?