RE: the desire to avoid seeing the imported items that don't really need to be signed-off on... we followed someone else's advice in a previous post to create a "dummy provider" to designate for those imports.
Then we can log in to AC as the dummy provider and sign-off on any items that have been imported which the doctor doesn't need to sign-off on. Examples would be paper documents that were already physically signed-off prior to scanning and importing, paper documents handed to the doctor by the patient, forms the doctor completed, etc.
We named our dummy provider "Dr. Sign-off Unnecessary" so that the name would come up in the drop-down lists after Dr. Taylor's name (causing less problems in other areas of AC).
We have found that importing non-medical items (e.g., insurance card scans, HIPAA signatures, etc. into the Non-Medical "type" category does not result in the item going to any message inbox for sign-off.
Hope this helps.