What part of "does not use attacks if it can trample" was unclear? Obviously trampling only works against smaller targets, so against equal sized or bigger targets it will use the sword.
Actually you'd be surprised whats clear and unclear after spending 9 hours inside an unairconditioned warehouse in texas full of dusty, greasy, sticky, chewing gum covered Wal-Mart guts and fixtures.....
Ouch! I feel for you. Though spending six hours on the phone sorting out the net connection problems of computer illiterate people can have a remarkably similar effect...