Help with "Notifications and Email" settings please

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For some reason I keep getting multiple email notifications for topics I am no longer subscribed to, topics which I have already received emails for and have read and also for PMs which I have already received emails on a fews day before.  What is going on?

Everyday I get home from work, there a about 10 to 12 emails for stuff I already have received notifications from.  I look at the post and discover no one posted anything new inside, so I am wondering why I keep getting these emails.

I went to my Profile and clicked on "Notifications and Emails" and can see the following:

For topics and boards I've requested notification on, notify me of:

In this selection you can choose emails or moderation stuff.   What does "moderations" mean?


(EDIT)
Ugggh .... I also get an email notification when I reply to a post I am also subscribed to ..... I go to check the post and find out I was the last person who responded to it .....  this is annoying.
(EDIT)