When did the Orthodox and Catholic Churches distinguish the manner in which the Sign of the Cross was to be made?

From a comment on What is the role of “Sign of the cross” gesture in Catholicism? , it was noted that Catholics make the Sign of the Cross by starting at the top, going to the left and then right, while Orthodox go from right to left (after starting at the top). What is the origin and reason for this distinction? I'm also wondering if this distinction is universal in each church or if it differs to some degree inside each branch.