I think you could do this 2 ways, both are kinda of abusing features.
You can either have no values in the text columns and just play with the formatting to the background colors so that the text just shows as blank (that'll get rid of the "abc" from showing)
Otherwise you could probably just repeat what you did for the last 2 columns. If there are 2 values showing in the text it should then show a header for both, but if there's one it usually doesn't show header.
Hope this helps
Thank you both...I finally got ZZ's solution to work!!!