Nuendo 6 dual mono files won't open as stereo in WL

Hi, I am having a problem where dual mono files I create in N6, won’t open as stereo files in WL 8.5. Other dual mono files will open as stereo files in Wavelab, but it seems that dual mono from N6 will only open as mono files.

Any suggestions? I’ve posted on the WL forum too.

Any help will be much appreciated

Sydney, Australia