"Replace Link With First In Nav" not working on a single page

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Hello,

Not sure if this is the right place for this question, so sorry if it is not.

I have a site athttp://www.centralbottle.com. Today I noticed that the "News" item in my nav no longer goes to the first child page (calendar). However, that "Replace Link With First In Nav" attribute is added to the page and is checked "yes". The attribute is working correctly on all other nav items, just not "News" and also "calendar" is not working properly either. I have replaced calendar with an external link for now, but it does need to be dynamically loaded. Does anyone have an idea as to why this could be happening?

Kimber