The Other Darrin: The other school kids's voices will sometimes be different from episode to episode, but they're mainly background characters, so they don't have to sound the same all the time.
Talking to Himself: Since Keith Scott voices pretty much all of the adult male characters, this happens often.
What Could Have Been: Originally the series was going to be called Sally Kungfu and Sally was Chinese, but with the rising popularity of Bollywood in Europe, execs suggested changing her surname to Bollywood and her nationality to Indian.
According to an interview, the show was actually a combination of two propsed series, a detective show with the aforementioned Chinese girl and a comedy about a boy and his gadgets. To save budget, the execs suggested they combine the concepts and thus Sally Bollywood was born.