It seems like Wikipedia is downloaded due to "Get non-HTML files related to a
link, eg external .ZIP or pictures".

My theory is that because Wikipedia doesn't use .html or .anything, it's
considered an external source.

I've tried adding the MIME type "text/html" and left the file type empty, but
that didn't work.

But regardless of all that, HTTRack does download way more of Wikipedia then
what is being linked to. It seems like as soon as HTTrack gets a hold of a
Wikipedia link, it goes crazy and starts downloading all of Wikipedia.