arcast on "Errors in Posting New Content"

Help!

At first I just had problems uploading media (pics). Errors in uploading it says.

Later today as I was trying to write a new post I noticed that now instead of the usual SAVE DRAFT or PUBLISH button on the side, there's a SUBMIT FOR REVIEW button.

This is confusing since I'm the only one using the blog. Supposedly.

I tried to save a post as well as to click the SUBMIT FOR REVIEW, but what appears is this -> "You are not allowed to edit this post."

When I check the Users list, I'm still the admin and only user.

I'm not sure if this is a Version 3.5.2 problem or a plugin or maybe my site is compromised.

PLS HELP. Thoughts? Suggestions?

Thanks in advance!