are you trying to add the chapter from within your story (i.e. getting to it from the archive listing) or from your control panel? I also see 116 chapters, by the way, with an edit date of today.
I tested for the subdomain both from within the story for chapter add, and from the control panel. Was able to add chapters successfully from both points.
If you're adding from within your control panel, are you ignoring the "upload" file button? If you do, you should be able to c/p just fine. From within the story itself, you have to click "preview" in the bottom left corner, and add the captcha asked for.
Are you not seeing the text box itself for the rich text editor?