As I said, in a monk's case, a double strike (unarmed atleast, and 95% of monks are unarmed) is more or less the same as an offhand strike. And yes, they do have a chance to double strike, that chance is 0%.
Double strike is NOT more or less the same as an offhand strike.
Right now you have a 100% chance of "double" striking with an offhand strike. Do you get double ToDs now? Or double stunning fist?