title: Multiple adsense publisher id's mixing and matching etc
body: <p>Does anyone know the adsense TOS regarding using more than one publisher ID
  on a site.</p>
  
  <p>can a page have 1 ad using publisher ID#1 and another ad using publisher ID#2
      i.e the top banner ad is using one pubid and the bottom banner ad is using another
      pubid</p>
  
  <p>This is important as I have been noticing some very strange results lately, but
  I want to make certain what I am doing is 'legal' before saying more..</p>