To add the rounded corners to the table I just cheated a bit…
First I set the upper-left and lower-right cells to no fill (note the text in the upper-left is now the same color as the background and cannot be seen).
Second I created two rounded corner autoshapes. Each filled with same color as the table background and sent to back. I then positioned them to align with the edges of the table.
Finally I grouped all three elements so they could easily be moved. The final result is a table with two rounded corners.
– Troy @ TLC