I looked at the spreadsheet and can find nothing wrong. A. PC-ORD is expecting a number but finding something else. If you can't see the problem, re-enter the data in the cell and explicitly format the cell to be a number. Label encountered in spreadsheet when expecting number. Observe the right-hand side of the table first.
Rows receiving the same digit are more similar to each other than rows in different groups.
Moving to the right, the next column shows the next two divisions. Each of the preceding groups is again divided, as shown by the pattern of zeros and ones. We have not seen a good way of doing 3D ordination plots. A. Start two instances of PC-ORD, putting each in a window occupying half of your screen. Then put up a graph in each one.