https://userapps.support.sap.com/sap/support/knowledge/en/2626399
2626399 - WBS elements are not sorted | SAP Knowledge Base Article
When WBS elements are entered manually or through interface, they are not displayed as per sequence A-Z/1-9 or Z-A/9-1 in transaction code CJ02/CJ03 or CJ20N....
are notsap knowledgewbselementssorted