I was just going over my logs for traffic from Facebook Ads. Looking closely I noticed double clicks from multiple IP addresses! Some are even triple clicks. The number of clicks in my log exactly matches the ones Facebook is charging me for! That means Facebook is charging me for muliple clicks on the same ad by the same user in a very short time frame - like within seconds of each other. Rip off! They will definately be hearing from me about this.
Any information I find out regarding this issue will be posted here in the comments.
Focus On Facebook