Pilot training experience requirements—just do what the regulation says!
The crafty, creative CFI thought it would be a great opportunity for the student to get in some practice at another airport. In this case, he had the student grab another airport (a 4th) along the way. They thought that the student doing another landing at Marion (KMWA) would be some good additional experience for them at a towered airport. They aren’t wrong about that, but in a strict sense, it now means that cross-country solo flight doesn’t count toward the experience requirements for a private pilot certificate.