I will try to summarize this as best as I can, and I hope this makes sense.
I was attempting to log into my Minecraft Account, to change my username.
It provided me with several bugs of invalid sessions before it let me in.
Upon letting me in everything seemed normal until I pressed the "Profile Name"
Icon, which would instantly reload the page and bring up the option to purchase a Minecraft Account. 
Any actions afterward of trying to log in simply brings up the same problem in a constant loop.
So even though it shows me being logged in, whether with my profile, or even the option to change my skin & name, it still will let me do nothing as it acts like I am logged out.