Search results not returning file names correctly

Question

Have an onsite SharePoint Server 2010 Enterprise that contains a number of documents in a document library all containing the word "south" in their title. When a search is run with the keyword "south" all 3 files are shown in the results but only one displays
the correct title. The other 2 display alternate text (in this case the company name). The links all 3 results are correct, however the title of results is incorrect for 2 out of the 3.
I have duplicated these results using Office 365 and another on site SharePoint 2010 server.
I have duplicated these results converting the documents to DOCX format under Word 2007 and Word 2010.
Obviously, this is an issue with the files, however any ideas where to start looking to uncover where the SharePoint Server is pulling the information from? 
In the end I need all 3 results to display the current name of the files it finds, not simply some random text with the files from 2 out of 3 of the results.
Thanks
Robert Crane
www.ciaops.com 

Answer 1

Could it be because of this?
Pasted from here:
http://bpostutor.com/post/Hidden-SharePoint-2010-Feature-Changes-Document-Titles-in-Search-Results.aspx
Hidden SharePoint 2010 Feature Changes Document Titles in Search Results
SharePoint 2010 has a interesting feature which you may not know about.  It's called Optimistic Title.  It's part of the Office Search engine within SharePoint.  What it does is determine a new, hopefully more relevant title for your documents
to be displayed in your search results based on document properties or the actual contents of the document (i.e. Text within the file).  As you might expect this is closely tied to the Office document formats such as Word, PowerPoint, Excel, OneNote,
and Visio.  Your end users may report that the titles that they see for search results differ greatly from the file name or the actual title of the document.  This is particularly evident with PowerPoint files where the name of the first slide
is often used. The behavior is not entirely predictable.  Different results can be expected from Office 2007 and Office 2010 created files and even those created in earlier versions of Microsoft Office. 
If you want to change this functionality you need to actually go and edit the registry on your Search role server(s) within your SharePoint farm, restart the osearch14 service and then do a full crawl.  The key you want to modify is the EnableOptimisticTitleOverride.
The default setting is 1. Change it to 0 to disable the feature.