Microstation connect ElementChangedEvent ChangeTrackKind

Hi,

I overloaded the ElementChangedEvent event and get a ChangeTrackKind value in eventargs.Change

     Delete = 1,
      Add = 2,
      Modify = 3,
      ModifyFence = 5,
      Mark = 7,
      ModelAdd = 9,
      ModelDelete = 10,
      AddXAttribute = 11,
      DeleteXAttribute = 12,
      ModifyXAttribute = 13,
      ReplaceXAttribute = 14

But I get after moving an object (modify = 3) always anaddition event with a value 17. Anyone an idea what this means?

Thanks for help

Markus