I just found out that not all of my Reddit comments had been deleted despite my profile page showing otherwise.
anon@kbin.social to 
Reddit Migration@kbin.social – 1 points – TL;DR: even if your delete script confirms a full wipe and your Reddit profile page shows zero comment, there may still be comments left over (that you can find through a search engine and delete manually on Reddit).
Weeks ago, I used redact.dev to delete all my Reddit comments (thousands of them over 10+ years). Redact.dev confirmed a full wipe, and my Profile > Comments page on Reddit confirmed I had no comment left.
Yet, as of today, Google still returns dozens of results for “$myredditusername site:reddit.com”. It’s not just Google’s crawler lagging; when I follow those links, those comments are still visible on the Reddit website, under my username, where I have the ability to manually delete them.
Thankfully, I hadn't yet nuked my account, because I knew of other users whose deleted comments got reinstated (although that was thought to be caused by the deletion script exceeding the API rate limit; supposedly a different case, as those missed comments would still show in the Profile page).
spez: edited for clarity.
It looks like that's the case. I found a comment that was mine from 10 months ago. It looks as if Reddit recovered my deleted comments after I deleted my account.
At this point, I don't care. I left all that behind.
Is it possible the sub was private when you deleted the comments? This and known, since-fixed issues with PowerDeleteSuite explain nearly all of the "undeleted" comments I've looked into in-depth.
I used redact.dev and confirmed on reddit.com that all my comments were deleted well before the blackouts.
I'm not familiar with redact.dev and can't comment on its accuracy, but your comments from earlier in this thread make it seem like you only found out about how the limitations of reddit's profile page work about 11 hours ago. They probably weren't deleted to begin with.
That’s right, they were most likely never deleted in the first place, despite Reddit’s indication to the contrary.
Can you show this indication? Otherwise, this looks like a pretty clearcut case of user error.