aakk9999 - 12:40 am on Jul 11, 2013 (gmt 0)
Yes, possible. It is also possible that Google is "adding" query string to see if this will uncover "new pages". I've seen this on one of my client's site where Google has added query string often found in Wordpress URLs (but the client site was not in Wordpress)
I am wondering if they are left overs from their prior site and just sitting in the Google database.
Many websites with dynamic page generation have the same problem. For example, if you try this (replace www.example.com with your client's domain name):
However, why are they resolving to the home page?
You will most likely find that this will resolve to home page.
The reason is that in most back end scripts/applications, the script only looks for parameters that it *needs* to generate the page (and it will only error if mandatory parameter is missing). But most scripts will not check whether there are additional parameters that are not required. So appending spurious parameters will still generate the page based on the URL (and the other parameters the script needs).
One must be careful when coding the script not to accept any additional parameters because in this way you may end up supressing/redirecting pages with tracking parameters - hence handle this with care.