STATISTICS ON VISITS TO MY WEBSITE

My website is www.rotocon.com and I'm wondering why the country identifier is not always correct. For example, I just visited my website after making some changes and then went into statistics. My visit was identified with a Canadian flag! It indicated that I came from Ottawa, Canada. I live in Florida and have only gone to Canada twice to visit relatives. I did not bring my computer. I have noticed some of my customers have also been identified as being in Canada when they were actually here in the U.S. Why is it producing these errors in the Stats Section?