I agree that the issue needs to be clarified. Regardless of what the authors of the rule book intended, it is clear that not all TDs, after reading the rule as it is currently worded, would interpret it the same way.
After thinking about it, I am convinced that the rule should say “. . . the position is considered the same if pieces of the same kind and color occupy the same squares and if the possible current and future moves of all the pieces are the same, including the right to castle and to capture en passant.”
The argument for this is that the purpose of the 3-fold and 50-move draw rules is to resolve cases in which a position is unwinnable by either player, but one or both players are unwilling to acknowledge this by agreeing to a draw. The reason for requiring a 3-fold (rather than a 2-fold) repeat of a board position is that a player might inadvertantly make a move without realizing that his opponent could then force him to move back (to escape check, to defend a piece, etc.). But after the 2-fold repeat, he shouldn’t inadvertently make this mistake again, so if the position occurs a third time, that is good evidence that the position is genuinely inescapable. But this argument is valid only if the board positions are really the same, not just in terms of positions of pieces, but also in terms of ways in which the game can subsequently proceed. And that requires considering all possible subsequent moves - not just those that can be made immediately.
Bob