Not sure what to tell ya. I am using the checklist myself and have the full 1300. Reborn is the first secret achievement and shows up both in Achievements and Guide view. Maybe check your browser if you have any sort of ad blocker that may be interfering (or other add-ons), and as a last resort use a different browser all together.
Nope. I enabled "My Achievements" 2 days ago and didn't find it. Weird, still don't see it. I'm not trying to be a nitpicker, just noticed it. I don't have many achievements in the game yet, so it's been that much noticeable to me.