Dear Bill,
Based on your description I think you have ran into a known bug in ARCHICAD 20. The issue was that when you shared a project that contained Interior Elevation groups (which used to have 4 sides), but you deleted some of them, then the deleted sides reappeared in the project map (usually in green), but not in the floor plan.
This should already be fixed in the latest updates of ARCHICAD 20. Please make sure you have that installed. After installing the latest update, sharing should not cause this issue and these "phantom" IEs should go away. If for some reason they are still stuck, you should be able to get rid of them the following way (Turn those deleted Viewpoint markers back on offline, and reshare):
1. Download a PLN from your Project and open it
2. Select the Markers in the floor plan
3. Right-click on them and choose 'Restore All Interior Elevations in Group'
4. Reshare the project
5. Delete the restored IEs in the shared project now (so the sharing won't cause them to come back now)
I hope this will solve your problem! Good Luck!
Regards,
Daniel Alexander Kovacs
Professional Services Consultant
GRAPHISOFT
For Troubleshooting and useful Tips & Tricks visit