first of all, the answer grid helps alot. it allows you to see what you messed up on. but your missing the point. im talking about everybody taking the same exam, equal playing field
How much does it really help? What are the odds of you remembering the questions or the order they came in, no less your answer choice? *&^%, the June LSAT was massively discussed on here, but I doubt most them remembered anything other than that one question that ended up getting dismissed, and that's just because it was so damn confusing.
Furthermore, no, you are missing the point. They can't both accomdate you and provide the same exam, since you would then have a leg up chance to get the answers (and don't act like people wouldn't). It is NOT feasible to force everyone to take an exam on Monday with you. We have lives. Saturday is the only convenient time.