On Workspace freeform table, I have Last touch channel vs key metrics set up. There are rows of last touch channels that show up even though the key metrics column come up as "Invalid" or a zero. How do I stop this from happening?  

I have set up the campaign tracking codes classification on our production report suite. One of our advertising agencies suffix their UTM parameters to our code before sending out ads. The RegEx I have used is ^(.+)\_(.+)\_(.+)\_(.+)\_(.+)\_(.+)\_(.+)\_(.+)\_(.+)\_(.+)\_(.+)$ Some of our reports are...