This is the second time this has happened. I delete all my old posts and comments using PowerDeleteSuite. I view my profile - everything selected is gone. A few months later, it’s all back. I repeat the process, verifying it’s all gone. I log in today, months later, and it’s back. Simply maddening.
Is there anything I can do to make it stick?
It’s not that it undeletes them, but that it keeps some of your comments unreachable. Every few months it re-indexes stuff and then with everything that was reachable before being deleted, it shows a different set of comments.
You can see more comments if you access the list with different params. For example, after deleting all your comments sorted by top score, you can access them sorted by controversial and you’ll see a whole other list of comments still there.