Analytics says I have traffic from CPC but no charge in Adwords account?

So my analytics says I have traffic from some keywords... however it shows no charge for this is my AdWords account?

 

two clarify. people have clicked our adwords to hit our site (it shows the traffic) however it shows no charge?

 

Was this just for one day, or does this happen consistently?

 

I think that happens when a person clicks on your ad more than once within a minute of time. Adwords doesn't count the click which is similar to the Adsense program. I could be wrong about this though.

 

it's weird.

It was me clicking so could google be ignoring by ISP if I have it as a filter in my analytics?

 

It's probably being counted as invalid clicks - look under billing > billing summary and see if you've been credited.

 

I do not believe that Analytics is 100% accurate i've had discrepancies between AdWords, Analytics and web stats packages a number of times before