There is a weldment properties text file that i believe SW uses for its headings. Mine is all in caps so it comes in as caps. I would edit that file in notepad after saving a back up copy and try it. It's file name is weldmentproperties.txt. mine is located in the same directory as the weld cut list template. Below is my copy.
My weldment properties match yours exactly (including "DESCRIPTION"). However, it is still coming in lower case in the table (see image).
I also noticed 'LENGTH" is not being shown in the table for the extrusion (works on other drawings). This just a test drawing for setting-up the SolidWorks templates for 2012x64 SP 4.0. I was able to resolve the layer issue as the dims & text should be on a different layer.
You probably already know this, but while in a drawing you can highlight a column of a Cut List and type whatever you want for the column title in the Title: box in the PropertyManager. The column will keep the same property, you're just changing the title that shows in the table. If you save the template this new column title will be saved as well. Won't that work for you?