Old Comments Showing Up On New Posts

I’m getting old comments showing up on my new posts – some from 2 years ago! The dates aren’t similar at all and there’s no common linkage between the posts – it seems entirely random.

My biggest surprise about this is that I screwed up my database a little while back and had to re-do everything. I thought it had all been deleted along with my missing posts from the past 3 years. Obviously the older comments are hiding somewhere and keep insisting they belong front and centre on my newer posts.

How can I find out where these are so I can block or delete them? And why would they be attaching themselves to newer posts that have no relevance to the older non-existent posts?

I’ve looked for others with the same problem in the Forums but haven’t found any. Hopefully there’s an answer out there.

Cheers.