The phrasing of the rule itself isn't always the most important part. There usually is a common interpretation, be it official or otherwise, to specify what others already mentioned as the spirit of the rule, which tends to be more important than the literal rule. Was the "continuous forward motion of the player" an older phrasing of the rule, or was that the league's publicized interpretation so far? Either way, that's what makes sense. The point of the rule isn't to outlaw quick forth/back stickhandling or a wind-up for a wrist shot.
It might be in order for the league to adjust the phrasing to represent that a little better, though.