For a wide range of reasons, we don't always have reliable ways to remove every blank page from every document. It seems as though DCC will not tag a blank page as done if there are no OCR results. As a result, fully OCR'd documents are still shown as having Some pages OCR'd, and not All. This is using server Version 9.1, and the edition of DCC that was released last Summer.
Note that we do not see this behavior when OCRing a document manually. There it tags the document pages as All, even if there is no text on a blank page.
The request would be to mark a document as Done if it has been OCR'd via DCC even if the document contains blank pages.