hi, found bug Reference number sorting in Production Order
And also Delivery Notes
Edition (Server, Desktop, Cloud) and version of Manager?
The current edition is 22.214.171.1246, so maybe you should update and see if the bug has been corrected
For users who have entered alphanumeric references, an alphanumeric sort is correct.
For those who use numeric only references then a numeric sort would be more appropriate.
Many users have requested business controlled prefixes so it is not obvious which is actually best overall.
See this similar post in the