hi Wade,
do not right click on the cross-tab and choose to Insert a Chart. charts based directly off of cross-tabs are limited in their design.
instead, go to the Insert menu and choose Chart. in the Data tab choose Advanced. Type would be Line chart.
for the On Change Of choose a formula with the Month Name and no year. in the Show Values add the multiple series that will create the lines.
you can edit the Order of the On Change Of to a Specified Order.
-jamie