This may not be exactly what you want, but I took a Duplicate of your "Now it's not" Worksheet, removed the pill from the Size -- then I changed the "Year of Order Date" to Discrete and plopped that in on the Size shelf. It made the 2012 line nice and plump.
Some variation of that hack might get you want you need, if this hack is insufficient.
Thank you! I think that hack will do the trick.