Sometimes when I use 'centre across selection' to centre horizontally
across more than one cell, if the cells in question have an outside
border, the right-hand border often disappears when the left-most cell
contents are centred across the selection.

However, this behaviour is inconsistent and I can't figure out what
causes it when it happens.

I have examples & can't figure it out.  I know it's not a major hassle
but would like to know why.

If anyone could help I would greatly appreciate it.

Regards.......Jason