When I do a contingency analysis, the numbers in the table are too big for the column and they end up overlapping. There is no way to adjust the size of the columns or the text formatting so that this doesn't happen.
I can confirm that this particular wish has been granted in the JMP 17 timeframe. JMP 17 will be available in fall 2022. To change the format of values in the Contingency Table, press Ctrl+Shift when you right-click the value in the table and select Format.