Stop asking for password when updating apps

Hey. So on my sons Ipad he has like 20 updates waiting. And somehow it require me to EACH update. Must be some kind of bugg.. should only be required to enter password once when pressing the "update all" button......right?

What am I doing wrong?

And I even removed the password requirement in his settings. Its STILL asking for password for EACH update of app. I can understand if he download a NEW app. But this is just and update of an app he already have.

Please tell me what I'm doing wrong here!

Thanks!