For example, if you hover over the "Yarn" category in my shop (this is the parent category) you'll see a drop-down menu including Sock/Fingering Weight, Sport Weight, DK Weight, etc. Clicking on any of these categories shows a large selection of products that fit each yarn weight, as it should.
However, if you click on any of the additional properties, such as Wool-Free, Solid Colors, etc., no products show up, and all that is displayed is the parent category page.
The only thing that is different about these categories that aren't showing up is that products in these categories are double-referenced, i.e. I have checked both "Sport Weight" and "Solid Colors" in the Links tab, for example. In the past this has worked fine, and the product will show up when a customer sorts by either category, but all of a sudden now they aren't.
Any ideas? I'm stumped
