I same issue with gate positions, I am ussing Orbx with out problem, until i use flash scenery from them.. and "readjust" the scenery library..., today. I notice.. that my CYVR was 18 position.., I put it back on first place.. and no everything works perfect... I ciould not find any duplicate as well with the siimply scanner...btw.. maybe is a Priority thing?
Marcelo