I been working with a merchant for a few weeks who's product links are all being redirected to their homepage. So I trying to figure out myself where the problem is, so for my example:

CJ Product link (This is a fake link)

When I use the above link I land on the http://www.merchant.com

So my question is can I find out what link CJ sends to the merchant site?? I wondering if they are sending the site url with the product url or just the site URL (Homepage) ???

I have also changed the url on one of their text links pointing to a product page and the link also goes to their homepage.