I am unable to spell simple words without memorizing them, but I am dyslexic. You may want to get her checked for that. I was in honors classes my whole life and can read very well. I also finished collage English but spell at a third grade level. I am fully capable of spelling lots of large words used in everyday life, while unable to spell simple ones.
I am unsure about her inability to draw, I was always alble to draw age appropriate drawings. Good luck and I hope you find the answers your looking for.