a mini tutorial
I didn't realise I had a comments spam folder until Elephant's Child told me where to find it.
So here it is for anyone else who doesn't know. This only applies to those using Blogger. I have no clue about Wordpress.
First, go to your "new post" page:
on the left there you'll see "comments", click on that and all your published comments appear
and see this window which has the published comments, those awaiting moderation (0 for me) and the spam, also 0 for me. If there is a number other than 0, click on that and those comments will appear. To the right of each comment if you hover your cursor there will be a tick to click on if the comment is not spam and you wish to publish it. Go ahead and do that and many "lost" comments will now appear on the posts they were meant for. Any comments that are actual spam can be deleted at this point.