look back question

[Dakota]

"If a runner is moving toward a base, other than first base, when the pitcher receives the ball in the circle, that runner must continue toward that base or be called out."

I don't have my rule book with me, so I can't read this sentence in context to take a stab at what the intent was, but, hey, look at it this way... if you took that sentence literally, that would mean that the runner moving toward first base would not be required to continue toward that base. I'm sure that is not what they meant, either!