Mono export coming back stereo

It seems I had done this ad nauseum before Cubase 5 but now a problem. I need to export some mono audio parts to a desktop folder. I choose the track in the left column in export window making sure the L/R or stereo isn’t selected. Each time I import to check it it’s stereo. Any help on what I’m doing wrong?

The problem went away after I reinstallled 5.5.2