Difference Between Resolved URL and Setting referer & remove parameters

Hi,

I am scraping a site and I notice that there is a difference between the resolved url and then the setting referrrer to url. I was wondering what this means with regard data being inputted into the site?

One other thing. I am using the remove parameter and this seems to be changing the parameters. Do the parameters not go back to the default after the scrape of a page?

Thanks in advance,
Seamus McMahon