Thank you - the solution was somewhere in the replies to the article you directed me to. What worked for me is as follows:
1. Start at the top of the table and work down from the top.
2. Split the table so that the bottom border you are trying to apply is the bottom row of the table.
3. Apply border to the cell you require.
4. Remove table split to create one whole table again.
5. Go back to point 2, repeat.

Thank you!!!!