Ref: doesn't removing the 1st post in the topic remove all sub-posts
When using this forum I clicked by mistake the delete button instead of the edit button on my opening comment in the post. This removed all comments in the post including other peoples. Luckily I was able to use my browser's back key and cut and paste to resurrect all the comments. I added a note at the top of each to say who posted each comment.
Perhaps have just an edit button for the first comment?