Some people don't understand that you do not type a URL - you just type a blog name, when checking for availability.I can't seem to type in a URL, without it saying it's not available.
This is the (BlogSpot) URL of this blog.
This is the (BlogSpot) name of this blog.
If I was going to use the "Create a blog" wizard, and create this blog, I would type the name - "bloggerstatusforreal".
If I typed the entire URL "http://bloggerstatusforreal.blogspot.com" - even if "bloggerstatusforreal" was available (and no, it is not ever going to be available), I should expect to see
Sorry, this blog address is not available.
This blog address is invalid or not supported.
It's that simple - only type the name, to create a blog. And - only create a blog once - then spend your time creating "New Posts".