This is product defect issue. Defect case has been raised JIRA 1565. This will be fix in version 10.1
Obtain patch from support and follow steps below:
1. locate the <install folder>\plug-ins\soo folder
2. rename the file SoOUnix.xml - as a backup
3. copy the SoOUnix_9.6.xml file from the zip attached to the same location and rename it to SoOUnix.xml
4. run Spotlight as before and test.