So the folks that registered "TheInvincibleSummer" also registered "InvincibleSummer" - which is why one leads to the other?
Yes - many times people register different versions of a name and send the different names to the same site - also helps to prevent copycat blogs sucking bad spelling traffic from a site - one radio show host has something like 4 or 5 versions of his domain name registered - the common spelling errors
http://blerj.wordpress.com/ - loads fine for me
You want to make sure you cancel the domain mapping or whatever you bought - that saves that option if you purchased a bundle or gets your money back if you just bought the domain mapping
I will flag this for the staff to review your account to make sure you are not paying for something you are not using
good luck with your new blog