Admin area wasn't working right, kicked me out and I can't get back in

Okay, here is what happened:

I logged into my admin area to add a new post. When I clicked, “Add a new post,” it took me to what looked like the normal page to create a post with one major difference – where the post content box was supposed to be was a message that said:

“You are currently editing the page that shows your latest posts.”

I Googled this and found someone saying I should change the number of posts per page to the default 10 (I had it at 50). But when I’d set it to 10 and click save, it would go back to 50.

I saved it a few times only to watch it go back. THEN WordPress logged me off.

So I tried to log back in but my password didn’t work. I tried resetting by email and when I’d click the reset link it would tell me “invalid key.”

So I tried every reset option at http://codex.wordpress.org/Resetting_Your_Password#Through_phpMyAdmin and none of them worked. When I tried to change it via PHPmyadmin it didn’t work because when I tried to edit my username’s password it said that it was in read only mode. I don’t know where to change that. All the other options on changing the password didn’t work at all. Even the emergency.php one.

So I don’t know what the heck is going on and am about to have a panic attack. The site is a new one at http://shareinator.com. Any help would be appreciated.