NFHS Quarterly - Situation 9 on page 20

[kentref]

Your comments please on the following situation (#9 in the NFHS Quarterly - page 20):


During an attempted onside kick from its 40-yard line, the ball bounces into the air. As the ball is airborne, near R's 49-yard line, K2 jumps and controls the ball at R's 48-yard line. Prior to K2 coming to the ground, K2 is pushed out of bounds where the recovery is completed. In the covering official's opinion, K2 would have landed inbounds. RULING: Free kick out of bounds. (2-4-1; 2-34-1; 6-1-8)


If they are saying that the rule reference 2-4-1 applies in this situation, then why is this not then K's ball 1st and 10 at R's 48?