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?
Yup. I remember reading something about this in another post a week or so ago. Reddit only lets you (or the bot doing the auto delete) see back through just about 1,000 comments or something along those lines.
Everything before that still exists but just isn’t accessible through your “Past Comments”, you’d actually have to find the threads themselves or like you said, re-sort the list so it indexs a different set of comments.