Madelyn Howard

I loved this movie, the art was beautiful (and so was howl;)!) But unfortunately I didn't really quite get some parts. I feel as if they didnt explain what was happening very well. SPOLIERS!! Like whenever Sophie took the fire out knowing that he said something bad would happen and then going right back in after the house collapsed and tried fixing it? Like why take the fire out in the first place. Going back to how I said they didn't explain things well. Sophie just left her house and where she works and never said anything to her mom or sister and just left without a trace because she turned old??? And then her mom came because she had too or something and didint even question why she was old? And we never heard from the sister again. Maybe I just missed something.