Multiple Instances Starting Up

Hi I've got a very bizarre situation. It appears that, when I load a webpage to my browser, multiple instances (at least 2) are starting up. The app loads and runs fine on a Windows XP box, but when I try to run it on my Windows 8 laptop it would seem that more than one startup event is taking place and causing all kinds of collisions. This is happening with both Firefox and IE. To verify this behaviour, I placed a static int within a class, checked it to see if its value is greater than zero, throw an exception if it is, then increment the int. Of course, the exception is thrown. What's very weird about this is that there is no multi-threading/multi-tasking involved. I'm thinking that this is an issue with IIS and the way that I have it configured. The truth is that I'm pretty much clueless about IIS. Any help with this would be very much appreciated. THANKS! ...