Hi,
I actually managed to fix this issue. All I did was purge the URLs, and also purge the 404 URLs. However, now all the links on the Brands page return 404 pages. I'm wondering if this could be related to my SEF settings in Hikashop, or possibly even the aliases of the categories? At one point some of the product links weren't working.
Strangely, when I purged the URLs the first time, it broke two of my category links. After the third purge all the categories were working again, as was the Brands link, even though I did not change anything, but now I noticed the individual brand links are broken. Any ideas? I am not necessarily saying this is a Hikashop issue - I'm currently unsure what is causing it - but I want to rule out all possibilities so that I can find a fix.
Thank you.