This is strange. I never face a problem like this all the years,
Let me say, there is no indicator in the QA tests and examples that NetOffice raise an event 2 times.
(Try the NetOffice excel vb event example to see the event comes twice)
(I see one possible error here related to multiple loaded addins: Excel identify addins by the first 8 character of the assembly name. If you have more addins loaded with the same 8 chars at the beginning - you may face issues here)
*Sebastian
Let me say, there is no indicator in the QA tests and examples that NetOffice raise an event 2 times.
(Try the NetOffice excel vb event example to see the event comes twice)
(I see one possible error here related to multiple loaded addins: Excel identify addins by the first 8 character of the assembly name. If you have more addins loaded with the same 8 chars at the beginning - you may face issues here)
*Sebastian