It should treat slashes / as word separators.
Are you referring to ST2 or ST3?
In my quick playing around I seem to experience what you are reporting in ST2 but not in ST3 but not sure if my settings are identical between the two.
But all in all it seems your problem may be addressed by ST3.
If you have a ST2 licence try the ST3 beta and see if your milage is the same as mine.
Customer support service by UserEcho