While I appreciate the answers thus far, I think a basic part of this rule is being overlooked. It is possible that the original goal is never completed. The twists can keep spinning the story further and further away until such a point is reached in which resumption is nonsensical.

You can and should go from twist to twist to twist to twist, etc. Twists are new situations, once presented the players might not even want to go back to their original goal.

That's on page 91, second column first paragraph.

-L