Sorting is my life. I'm a database administrator/database analyst/database programmer by trade. You were right as well on the file types, but in this case it's just for sorting.

*hugs Mei*

Good to see you ;)

In this case, it's a sorting filter. Asc (ascending) sorts things from first to last and Desc (descending) sorts things from last to first.

On Colourlovers, it sorts from newest to oldest (desc), and oldest to newest (asc) pattern templates made. If you want to see the original set of templates we could use, you'd sort by asc. The more recently created templates would be from desc.

Hiya! Firstly, welcome to CL. ^_^
Desc and asc are file extensions.
desc = description file
asc = agent character file

As for what makes them different and what their functions are, I have no idea.