understanding invoice image recognition report

Could you please help understand below points:

• “Total cancelled or deleted” - Invoices are not cancelled directly from OCR, from where these invoices are getting cancelled ? where can we see why these are cancelled ?
• “Attribute Recognition %” - Is this the accuracy percentage or recognition percentage ? Why the same is being cancelled from “Total Completed”, Ideally it should be from “Total created”.
• Total created items (Header level report) are different from Total created items (Line level report) - Why is there a mismatch ?
• Can we see some report where we can identify - Total volume for the month (Recognise % vs Accuracy %) ?