Thank you very much for the help with the pages, they work perfectly!
If a user has a gravatar profile description, chateau will actually use that description and do an 'about authorname' w/ description & link to author's archive at the end of each post he/she writes. This is what the 'author' is (currently not full-width?)
With regards to the rest of the shift, it seems that the 'like' button and users that liked the post has taken up the space to the left correctly, but the comments themselves have not taken up the full width either.
As for the menu, is there a way to... encase it between two lines (such as the one in between the title and the banner image)? In addition, the menu appears to shift position when logged in compared to not logged into wordpress, since I guess that the wp menubar changes its position in some form? Is there a way to fix this so it appears in a set position below the banner when both logged in, as well as logged out? (like the default menu) Also, I'd like to remove the line between the title and the banner, here's a mock-up image from a screenshot edited in paint:
Thank you again, I know this is a lot of questions!