[svm1010]

So we get to dig really deep into the rule book on this one.

On page 89 under the motion section you can read......
"Except for the QB under the snapper, the player in motion who started from a position not clearly behind the line of scrimmage and did not establish himself as a back by stopping or at least one second, must be at least 5 yards behind the LOS at the snap. Either a player legally in the backfield or a player legally on the end of the LOS may go in motion if these previous requirements are satisfied.

So,

A) If you have a player established as a back he can go in motion and it is legal as long as he does not motion towards the opponents goal line.

B) If you have a player not established as a back he must be on the end of the Line and he must retreat at least 5 yards into the BF before the snap occurs.

Based on the original situation I believe case A applies I have been unable to find anything that says the motion must be 1 yard off the LOS. Ed, do you have a rules reference for that?

If not I might be changing my answer..... Legal motion?