I'm actually a little confused. The first URL you post (
maggiessiblingsandfamily.info/) isn't a sub-domain as it resolves properly and is a primary domain of the .info class. In that case, I would suggest the following settings:
Site URL:
maggiessiblingsandfamily.info/
Base URL: maggiessiblingsandfamily.info
To me, that's not a subdomain at all. The Site URL you post above is for a different site, and actually seems unrelated. Although it does have the .info site you mention above it 'in' the domain, if someone were to create google.com.mydomain.info, it wouldn't automatically make google.com part of their domain. Hope that makes sense, but from my standpoint, all the URLs mention above are unrelated. If I'm confused about something, please clarify, but I'd suggest trying my settings above and see if it helps.
Good luck!