Google Analytics behaving strange with Extensionless URL

Google Analytics behaving strange with Extensionless URL

We have a site, that is experiencing double tracking like symptons.
http://www.marilyn.ca/cibc or http://www.marilyn.ca/Cooking
If you pull up fiddler, you will notice that you get 2 responses back from
Google Analytics. But if you look at it closely. The UTMP parameters are
actually different
One is /CIBC, the other is /CIBC/
With this site in particular, it is extensionless URL. We don't have the
problem with other sites that don't have extensionless URL. Is there a way
to get around this and get it fixed?
Please advise.
Thanks