In 4D Write Pro, when stylizing tables, the borders overlap. As such, if a specific side of some cells are modified, it may not be visible due to the adjacent cell's border covering it.

Cells are layered with the upper most right cell having the heighest layer and the lower right most having the lowest layer. As such the bottom border of a cell will cover the top border of the cell below it, and the right border of a cell will cover the left border of a cell to its right.

Thus to fully change the style of a specific cell that has a cell above it and/or a cell to its left those cell's borders must also be modified.