When sorting the Opportunity Grid using the "Assigned To" field the grid is not sorted correctly.
For example when using demo data:
Note the users are sorted by the user id (system admin is first) but you would expect they would be sorted alphabetically (starting with Brian Little).
This issue has been escalated to development and will be resolved in a future release of Sage CRM
The reason this is a bug is because if you want to filter your search with the “Assigned To” field it is sorted alphabetically.