title: Custom Channel Grouping
body: <p>Used this code to create a custom channel grouping but it includes an extra dimension that is not named but has data valued on the time series</p>
  
  <p>I have tried to edit the code and reenter it but the extra dimension still remains and because it is not named I cannot figure out how to eliminate it</p>
  
  <pre><code>CASE 
  WHEN ((Source="direct" AND Medium="(not set)") OR Medium="(none)") THEN "Direct" 
  WHEN Medium="organic" THEN "Organic Search" 
  WHEN Medium="referral" THEN "Referral" 
  WHEN REGEXP_MATCH(Medium,"^(cpc|ppc|paidsearch)$") AND Ad Distribution Network!="Content" THEN "Paid Search" 
  END
  </code></pre>
  
  <p>I expect to see Direct, Organic search, referral and Paid search as the only data values on my time series but I have all those appear and then another set of data values show up on the time series and in the legend but this dimension is unnamed and I am not sure where the code is wrong</p>