Facebook Comment Stack is spammed

For one of my sites I use the Facebook Comment Stack by Joe Workmann. Today the first time someone used it to spam my comment site. Is there a way to remove this comments? The only stack options are collapse, flag or report to Facebook (thats what I did).

Can you not remove from your facebook page in the normal way (clicking the x next to the comment) ? I assume the comments stack simply picks up whatever is on the FB page

That is the problem - I don’t find this comments at my Facebook account.

I see - that’s odd. No idea how that could happen

I also don’t see the other older comments at my Facebook account. That was my question, how to edit or delete this comments? I really don’t know where it is stored at Facebook.