All internal links suddenly broken – default to homepage

New blog looking good at yourlancasterhome.com/realestateblog.

However, for some reason all my internal blog links (posts, pagess, archives, everything) are broken and default to my root website homepage (I don’t do 404’s).

The people at hosting say it’s a coding issue, but I didn’t think I had touched any code.

Any ideas on what changed? Take a look at the blog and click any link. The urls LOOK correct on the hover – but they don’t navigate.

Thanks!
Jeff