My ex can somehow see my Facebook notes- and my profile is private. How?!

Here's the deal: I regularly post "notes" or blogs on Facebook. Back when my ex and I were still together, he would comment on them regularly. A few weeks ago I deleted him from my friend list and deactivated my account. I re-activated it today, but didn't add him back. I replied to one of my old notes and I get an email from him that's copy/pasted of someone's comment and my reply.

I've checked all the loopholes- I have my profile set to "friends only". My ex did not comment on or like this particular note, either. I consider myself to be Facebook savvy, but I cannot for the life of me figure out how he could see the comments on this note. Is there a trick I don't know about, or has he maybe hacked into my account somehow? He has never been on my laptop, and I've never used his... so I don't think he would've gotten my password that way.