there seems to be problem with OS X and unzipping .touchosc files for some reason it extracts the binary into an xml format. the .touchosc extension become a folder with the contained file. If you extract the same zip on a PC you won't have this problem. I can't seem to figure out why OS X started doing this, it seems to be a new issue perhaps with OS 10.6
you can do a test this yourself by zipping your own .touchosc layouts and then extract them again. you will get a folder with a .xml file. its really strange. Only way around it is zip the .touchosc file in a subfolder.
I have attached a OS X friendly version of the zip file. All I did was download the fie on a pc and reziped the same file in a sub folder. This should extract find in OS X without converting the .touchOSC file to a .xml.