Organizer changes to me when accepting event made with Lotus Notes

This problem seems to happen when an event is made with Lotus Notes (8.5.2) is sent to me via email. After I accept the event I become the event organizer and emails are sent out to all the other attendees by me.

Looking at the original CalDAV event in Textedit I can see that the event has an organizer listed this way. ATTENDEE;ROLE=CHAIR;... However, once the event is brought into Calendar that person's status in the event gets demoted to ATTENDEE;CN="FIRST LAST";CUTYPE=INDIVIDUAL;PARTSTAT=TENTAIVE;ROLE=REQ-PARTICIPANT... Looking at the imported event Calendar there seems to be no organizer listed which could be why I become the organizer. A sort of default behaviour.

Has anyone seen this behaviour or have any suggestions for me.

Much appreciated.