Thanks for that link. It may be useful in the future, but this comment was pretty instructive:
Basically he said that there's an important distinction between aggregate short volume data and short INTEREST data, and that the short interest data give a more accurate snapshot of what's really going on.
This could be market maker activity that are showing up as "short volume" when they are only short for a very brief time and close out the trade by the end of the day. I think the "short interest" data is more relevant, and it is virtually nil in CKGT.