*SPOLIERS* The Montauk thing makes no sense...any ideas?

Rating: 10/10 (11 April 2004)

No matter how good looking a guy you are, a woman who looks like Kate Winslet is not going to hit on you that hard on the Long Island Railroad. I'm willing to forgive Charlie for that stretch of the imagination.
But I can't forgive him for this plot hole. The Clem that is being erased from Joel's memory is not the real Clem, but the Clem that is in Joel's mind. How is it then, that this element of Joel's memory (i.e., the fake Clem) is able to tell Joel to goto Montauk? And how is it that Joel actually remembers to goto Montauk the next day, but remembers nothing else about his relationship with Clem? And how is it that Clem ends up in Montauk too on the same day? When Clem was having Joel erased, did the Joel in Clem's mind tell her to goto Montauk on a certain day? If that happened, the same question...How can the fake Joel tell Clem to do anything and how was she capable of remembering it?
Great movie, I gave it a 9. If Kaufman did not leave this gaping plot hole, I'd probably put it in the top 50.