Good ringtone app maker but i only can put one ringtone on my phone :/

As i was making my ringtones on my iPhone 5s they came out great. Only one small problem. It only uploaded one ringtone on my phone. Everytime when i want to upload a ringtone to my phone it only installs one on my phone. Yall need to fix this.

Sims18 about Ringtone maker 123!