Q: Display - Macbook pro and Canon LV-7585 projector

Works with my office projector but the Canon at a different location seems to be forcing Mirror image without a check mark in it.  None of the Canon settings seem to make a difference.  In Macbook "Display" Settings, I chose Resolution "Best for display."  In Arrangement, Mirror Displays is not checked.

This combination Macbook and projector worked fine for about six weeks, then started having problems.