Duplicated "SharePoint 2013" folders are displaying in K2 Management > Categories > Workflow > Steps. The same behavior can be seen in K2 Designer > All Items > Workflow > Steps.


Running the K2 Five Setup Manager under Configure options, will add an extra SharePoint 2013 Category under Workflow > Steps.


This is a known issue with K2 Five and it will be fixed in the K2 Five 5.1 release.