There should not have been “a blank one” in the directory space unless you uploaded it (or maybe set it up initially to be redirected).
Well, yeah there are several things you could have done at initial setup time to effectively “redirect” it. You could have set it up as a redirected domain, mirrored, cloaked, etc. instead of fully hosted. You also could have set it up fully hosted and set the domain’s “base” or “home” directory to be /home/youruser/majordisaster4u.net/gallery (which would account for what you are seeing happen!).
You can check this by visitng the Control Panel -> Domains -> Manage Domains screen, and clicking the “Edit” link under the “Web Hosting” column to see what is there.