Hi Dana,
It looks like some of the *.cat links are still being used through your site.
For instance, /StoreFront/B8I.cat is actually 301-ing to /StoreFront/category/B8I.cat and /StoreFront/B8I.cat (with anchor text "headphones or earbuds") is being used on the /StoreFront/category/controlling-the-low-end-on-your-stage page.
The /StoreFront/category/controlling-the-low-end-on-your-stage page is at level 7 in your site and is linking to /StoreFront/B8I.cat, making it at level 8, which then 301s to /StoreFront/category/B8I.cat, keeping it still on level 8 because of the 301, and finally redirecting with a 301 to StoreFront/category/headphones (which is a level 1, because it is accessible from the homepage (level 0) navigation).
Does that make sense?
It did in my brain... just let me know if it does on paper : )
Hope this helps.
Mike