Here\'s my fiddle:
http://jsfiddle.net/gFA4p/84/
In this screenshot, the green lines represent where I\'m trying to apply dotted lines.
Here is my fiddle:
http://jsfiddle.net/gFA4p/109/

All I did was add
.dottedBottomBorder {
border-top: none !important;
}
.dottedRightBorder + .dottedBottomBorder {
border-top: 1px solid black !important;
}
to the bottom of the style sheet, as well as add the dottedBottomBorder class the four cells on the right side of each pick column.
The problem you have is the bottom cell's solid border is overlapping the top cell's dotted border. This alleviates that.