you are not using page 3 to save and load.

use page 3 of the save page, this saves the song as a single song.

a normal save on page 1 saves a song as a single song in song position 1 with 9 positions empty.

when you have saved all your songs as single songs, then you can load them on page 3 of the load page. Here you can select which song position you want to load them to.

the problem will be solved.