If you’re implementing a Facebook Like Button, and copied the code from the Like Button page to paste generically into a template, then you may have a problem.
Using the iFrame code, by default, you will end up liking the same page that hundreds of thousands of others have liked, an example button.
You need to insert your current page’s URL into that. If you’re working on a dynamic site, it’s pretty easy to insert your current page URL in many languages (ASP, PHP, ColdFusion, etc). Otherwise, just type your URL in statically.