If this helps, I do a lot of support work for Columbus Speech and Hearing center (www.columbusspeech.org), and they deal with some pretty interesting things. I've never heard of the Silva stuff, but I will look into it. I understand that writing is based off the way words sound, which can be very hard to comprehend if you are having trouble with hearing.
As far as problems with heading into fits of daydreaming, realize you have enabled more creativity in yourself which will help in the long run. Congrats in overcoming hurdles, you've done better than I....