It's because your account is viewed as spam, typically it's because of certain key words, not sure what it is about you. It could be your ip address or email could have been used for spam at some point in the past (not on this site, it's a global matching list called Akismet)
The reason it takes so long is because I've been working 12 hour days. For the last couple weeks I haven't had a day off, lots of shit to do so I'm sorry about that.