Configuration apparently not saved in the unit

I set the unit with this configuration and make sure to press Configure Audiomoth:

But if I quit the config app, even not removing the unit from the usb, and restart the app, the config app shows a different configuration, which confuses me and makes me doubt on whether the correct configuration has been saved to the unit:

Is this "normal"? If it is, no way to get the config app to actually read the correct configuration fro the unit?

Agus