Hello alemanda,
I gave it a try myself, and I could reach the same state as you did, but I think this is just a rebuild issue.
If you open the MVO window and make changes to those settings, the contours will go missing in the Elevation tab, but if you do a Rebuild & Regenerate (ctrl/cmd+alt+shift+R), they should come back.
If you place these views on layouts as drawings, they should update properly. The Contour line setting shouldn't have any effect on sections/elevations anyway, it's just for the floor plan view contours (as the preview picture shows).
Regards,
Daniel Alexander Kovacs
Professional Services Consultant
GRAPHISOFT
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