Why do borders for some cells allow changes in line thickness, but other cells are locked in only one thickness?

Question

It looks like you should be able to choose different line thickness for cell borders, but for some cells you can get three choices (0.5, 1, 2 pt), but in other cases you can only do 0.5?
I can't make a consistent thickness border around the outside of all my cells!

Answer 1

VS,
Yes, I have lots of ideas. After all that work you probably don't want to hear them.
1. I would use PDF versions of rotated text boxes, inserted into the cells as background Fill rather than floating the actual text boxes over the table.
2. I would never merge a cell, or divide, a cell. Too many problems await you down the road if you do that. There are many ways in Numbers to avoid having to do those things. These are things we must do in Excel to get by, but we don't have to do them in Numbers.
3. There is a Line Type called "Thin" that has only one size, and another line type shown as a heavier solid for which the weight can be adjusted. It's possible that you have some places where you need to change the line type.
I believe that your difficulty may come from the merging of cells causing some ambiguity as to which border needs to be selected to change the display. This would be a bug, because you should be able to just select the border and edit it, but your table may have become so complex that the program has lost track of things in the course of all your changes.
My suggestion is to print your table just as it is, for reference, and start over in a new document, not an imported one. Don't merge or split. Use multiple simple tables and the occasional text box for annotation. You will be on your way to doing things the "Numbers Way".
Jerry