Not quite sure I understand, but are you are saying that big curve brick colour element is not supposed to be there? I think you may want to backtrack whatever you did before that showed up. The colour of it by the way is #b36464 and the only things in the stylesheet with that are the headings. I did notice one thing though which is also in my version (amazed it works) is that around line 601 of the style.css has a background-color: b36464; (it’s missing the # symbol). This line could probably be taken out.
By the way, I noticed you are on an older version of Encounters. Current version is 1.7.7.
However, as for the big curve…even with my webmaster tools in my browser, I was unable to find what that is. I did notice when you move the cursor over it, it becomes an i-beam (generally for text areas).
As for Encounters and all the things I need to fix and update (this theme is quite old actually), I plan on making some big updates with it soon…expect within a couple of weeks. The first big one to tackle will be to clean up the font situation.