I've seen this issue a few times myself. Normally this happens to me because of the way I am calling the event, and loading it in multiple times.
It would be REALLY helpful if you would post your code here. So we can take a look and let you know what might be triggering the multiple clicks. for instance, do you have the click contained within a function, and is that function being called multiple times? The same code being used in an html file makes me suspect you have an error in you asp file, as the ASP outputs plain old html, and jquery doesn't do anything until the html is recognized. If you can't figure this out, post your code and I'll see if I can spot anything. Pete