Using DEVONthink Pro Office 2.8.2 set the View to “as Three Panes”. In the column list turn on the Title column. Select a PDF and bring up the document properties. Set the Title to be an EXACT match (including case) to the Name. When I do this the title name disappears from the Title column for the document.
If I change the title to anything else such as the name with a space after it, or use different case, or a totally different title, then it shows up correctly.