I created a vertical fence with 7 icons in it, one icon wide. Worked fine for over a year. Today, only 4 icons are showing in the vertical fence. If I widen the fence to 2 columns, all my icons are there. Fences won't allow me to move them to one column! I can widen the fence so they are all in a line, but when I narrow the fence again, I can't get more that 4 icons stacked vertically.
I tried rebooting the computer; made no difference.
Why did it change, and how can I get my 1x7 vertical fence back?