Changing Synchronize from Position to Yes defaulting information on assignment eventhough set not to

Summary:

We have some assignments that have been set to No on the Synchronize from Position. And i would like to correct this so all are the same and are Yes. However, changing from No to Yes is causing the assignment to update with defaults from the Position - even though i have set the Manage Enterprise HCM Information section that relates to Syncing to only have some things - see below. However it's defaulting FTE and working hours, full time or part time, assignment category. Is there somewhere else that i'm missing that also needs to be