Enterprise Global has been set to "Fixed Duration" under the Options > Schedule > Default task type, however every new project schedule defaults to "Fixed Units". Please shed some light on why this may be the case?
Many of those Options settings have to be done either in the Project template or on the local system. Enterprise Global is basically used to store/capture custom enterprise views, tables, filters, groups, reports, etc.
Whenever a user connects to Project Server 2010 using Project Professional 2010, they are provided with the latest copy of the Enterprise Global file, so the user always has the latest version of every enterprise custom view, table, filter, group, etc.
The Enterprise Global cannot be used to specify Project Options settings for every user as it may differ based on project-to-project. So, each user must specify the required settings in the Project Options dialog on their machine.