Smiley and Todd are shown to be greedily stuffing many chocolates into their mouths for quite a while, yet then in a close-up shot of the box, only about six of the individual sweets-compartments are empty.
The second horse is nowhere to be seen after the carriage's crash, yet later when Hound and Watson are rescuing the first horse from the cliff-side, the second horse is standing near the overturned wagon.