Hi Martin,
For your information with PowerAMC 16.5.3.3 (4371) - Latest version available and running on Oracle repository 12c.
I have the same result when I create a logical model
Repository - You can see Diagramme_1 - v1 - At the end
Local - You can see Diagramme_1 - At first
For your information :
A) In "General Option" you have a field named "Sort" to treats numbers numerically when sorting objects in the Browser. For example, a naturally sorted list of tables would have the order: Table_1, Table_3, Table_12, Table_20 ;
B) This does not seem a problem about sorting objects with accents (as é, è, à, ò, etc) . Previously there was a bug and has been fixed by SAP.
I think you must open a Customer enhancement case to SAP