Blog Posts not displaying, pages working fine. Using Network Child

Sorry to be a squeaky wheel around the forums today :slight_frown:
I have decided to eliminate supporter and marketpress (I am relieved actually). In exchange, I will be enabling classifieds and membership. Upon navigation testing, I have discovered that the "Our Blog" menu tab is not working properly.
It is returning this error: Sorry, we can't find the content you're looking for at this URL. Please try selecting a menu item from above or to the side of this message to get where you'd like to go.
Now, for whatever reason, when I resave permalinks, it works perfectly but only temporarily. Any ideas?

(tutuology dot com)