Having the same issue with every module it seems. SSHFS is enabled and functioning, but when you try to configure modules to save the log using sshfs, it doesn't work. Quite a pita.
Using urlsnarf and you can start it, but it doesn't log anywhere. If you go to configure and you tell it to save the log location to /tmp or to SSHFS, it selects, you hit ok, go back into the configuration and it's right back to "do not save log file".
I've tried several things, like rebooting the turtle and rebooting my linux machine, but nothing works reliably. I'm getting to the point, just like with the Pineapple, of just using the command line and running things manually.