I don’t know why but when you add cookies to the RESPONSE, it seems to add the same cookie to the REQUEST. I was able to pin point this because I notice in my request, I had a bunch of cookies that I had previously expired from the response. Typically, when you expire cookies, you set the expire date time and add it back into the response.
Also, make sure you remove a cookie from the request AFTER you expire the cookie from the response. Otherwise, the cookie will still be available in the Request later in the process cycle.