I had 2 instances "Wood - Siding" in the schedule. One layer had a "Custom Text" description which was the only difference between the 2 . When I deleted the "Custom Text" the 2 instances merged. When I renamed the "Custom Text" to what I had, the 2 instances remained merged, thus solving the problem.
This duplication happened as I was making changes to the Wall's composite profile.
Still, Surely the Wall Component Schedule should match the actual wall, shouldn't it? And not have random elements listed that could cause mayor confusion if the drawings are issued with such errors?
ArchiCAD24 - since Nov 2020 Revit - 2005 to 2020 Windows 10 Pro 2 screens: nvidia quadro RTX 4000