^You're right. When she met and auditioned for LA Reid, she did two covers by Faith Hill and "Why". The latter was the first song she wrote on this trip with Cliff Fabri in late 1999.
I remember hearing the first song she wrote after touching LA was "Unwanted", Magness being the first person she met up with. Man how the record company wasn't into those songs. I think it was when they heard "Complicated" that they gave Avril the biggest chance. It was single material in their eyes straight away.
They initially signed Avril strictly as a songwriter but Avril couldn't find her sound after urging her way into being a co-writer. Don't quote me on this but I believe I remember Avril even denying the existence of a lot of those earlier Let Go demos and recordings because she just wasn't into them. I'm not even certain how much of her input was put into those.