Dyslexia is a learning disability, not a LIVING disability.
My ex is dyslexic, but he has no problems functioning in society. My son is ADHD/ODD, and I don't have to go sit in his classroom everyday to make sure he learns.
There is more going on with your daughter than just dyslexia I believe. You say the teachers can't understand her. Why? Have you had her evaluated for speech classes? If she's not pronouncing words correctly, have you had her hearing checked to see if there is a degree of deafness that hinders her ability to know the "correct" way to pronounce words? If her mind "wanders" as much as you say, have you had her evaluated by a pychiatrist for ADD or something similar?
I know, you said "let me deal with one problem at a time. First A, then B"... but don't you see that A could be connected TO B, and hampered even more by C? You have to treat the entire problem, not just one, or else she's not getting the help she needs.
Each different scenario I've mentioned above (dyslexia, deafness, ADD) has it's own componants. An ADD child processes differently than a normal child, as does a deaf child, or a dyslexic child. Hell, an ADD child processes differently than a dyslexic child, and a deaf child processes differently than an ADD child. Do you see what I'm saying? If you're only paying attention to ONE problem, when there could also be others going on, then you're ignoring the other parts that need help too.... in honesty, it's hindering her more than helping her if you're just worried about the dyslexia and that's it if she has other problems too. ALL the problems have to be fixed together to help her improve.
I'd have her tested for other learning disabilities. Quickly. Just from your post, it does seem to me that she does indeed have other problems as well.
JMHO