For bpmn 2.0 element with linked dictionary entry, the Collaboration Hubs overlay 'linked documents' count may be incorrect.
In editor, if you remove the 'global' linked document from the Dictionary items attribute and replace it locally with another document, the 'linked documents' overlay in Collaboration Hub will count both of the linked documents
This is a known issue and has already been forwarded to our developers to get this fixed. If you are affected by this issue and want to be kept up to date about this issue, please create a ticket in our SAP Signavio Support Portal and reference the ticket number SPM-14612
KBA , BPI-SIG-PM-DIC , Dictionary for SAP Signavio Process Manager , Known Error