(2) If full possession was no gained until ball was less than 12" from the goalline and not parallel to the sidelines, the ball wil need to be slightly advanced as end of ball cannot touch
R's goal line when spotted.
Ralph, this issue is common to NCAA (maybe even NFL, but I am not, have never been, and will never be, in the NFL). When Team A (or K, whatever you want to call them) possesses the ball, the most forward point of the ball (not necessarily a nose) is what is of interest, regardless if the ball is longitudinal to the sidelines, or rotated at some angle to the sidelines. If that point is between the goal lines - even by 1/8" of an inch - then a line perpendicular to the sidelines through that point on the field becomes the Team B (R) line of scrimmage, and a similar perpendicular line, at the point the length of the ball toward mid-field, becomes the Team A (K) line of scrimmage, momentarily. The ball is simply placed with its noses touching those two lines to establish the succeeding spot. There is no need to mysteriously 'advance' the ball, at all. It is where it was. Then, if the possession of the ball is to change, that is all that happens. Team B (R) now becomes Team A, and vice versa for their opponent.
If you think of the ball as always having its length parallel to the sidelines, and the ball is just pushed up and down the field in that orientation, when the ball is dead, your succeeding spot is established. Yeah, you might have to rotate the ball to be perpendicular to the most forward point of the dead ball, to establish the neutral zone, but that leaves the length of the ball in place, as it gets moved up and down the field.