After 15 minutes of clean voice and training the voice in the app is totally different from the voice I uploded

I was very excited to get voice.ai monthly, but I tried to build and train a voice.

I uploaded a 15 minutes mp3 with a very clean voice, built and trained the voice.

My surprise was that the voice that comes from the app it is not even close to the one I uploaded, I mean, the only similarity is that it is a male voice, but, it is not even a natural / normal voice.