The data-graph-color attribute is limited to 9 series.
for(var i=0; i<9; i++) {
var dataname = 'graph-color-' + (i+1);
colors.push(typeof $table.data(dataname) != 'undefined' ? $table.data(dataname) : typeof themeColors[i] != 'undefined' ? themeColors[i] : defaultColors[i]);
}
The highchartTable plugin can only set colors for 9 series. It should work with as many series as the chart contains.