more sales than impressions

In the app analytics page for "Apps" I see, as expected, 10x the impressions as sales.


However when I select the app, then go to the sources page, I see many more App Units than Impressions for some of the sources. How can this be? How can one buy the app without registering an Impression? Is this a bug?


thanks!

Give a prove, please! I would think this is a bug and should be reported to Apple

One edu purchase can equal many units.

more sales than impressions
 
 
Q