FAST Search Managed Metadata Problem

I've got a Problem with the number of Managed properties doesn't correct because of multiple value in crawled properties mapped with managed properties.

the results should be 249 for Content Types and at least 249 for Project Type because Project Type properties in mandatory field and allow multiple value. the the sum of Project type is just 230. There's something wrong with the managed properties, I though. Finally, I found the solution. Many thanks to the following links and Google. http://fs4sp.blogspot.com/2011/04/multi-valued-managed-properties-as.html http://blogs.pointbridge.com/Blogs/tseng_william/Pages/Post.aspx?_ID=14 http://msdn.microsoft.com/en-us/library/ff625183.aspx http://technet.microsoft.com/en-us/library/ff393811.aspx I didn't map the ows_projecttype() with my managed properties ProjectType.

After mapped with the correct crawl properties and rerun full crawl. it works.