Dyslexia and Dyscalculia

My daughter's struggles with reading and writing are now overlapping with her math. She is able to do simple math by using her fingers or other objects to count on (obviously this is fine for kids that age). Her numbers are written backwards, transposed, and read from right to left.
With her letters, it is inconsistent with regard to writing the letters backwards or the words from right to left. With her numbers if they are two digits she always writes them from right to left. "18" she writes as "81". If she sees "18" she will read "81". If it were once in a while I would not be that concerned. It is basically always. If she is given a multiple choice question with the right number on a list and she writes the number by copying it, then she will write it correctly.
When she was evaluated for Dyslexia she was also evaluated for overall intelligence. It was a neuropsychological evaluation that included Dyslexia. These tests also showed weaknesses in math. I have been focusing so much on the reading and spelling that I didn't really pay much attention to this area.
This poor little girl is having such a hard time and is at a early kindergarten level in everything. Although, socially, she is seeming to develop some social skills and interact with kids her age more then before.
With all the different overlapping diagnoses such as autism, ADHD, mood disorders, sensory processing disorder, dyslexia, (and now the thought of Dyscalculia, which is the Dyslexic equivalent to math.... etc etc I wish that I could really know for sure what is going on here.
All I know is that she is a really sweet little girl and every day is really opening up with talking and expressing herself. She still has her outbursts, and tantrums, and is very difficult to get her to follow instructions, but she really is an awesome kid.

Her big sister scored the opposite on all her testing. She scored very high in the superior range on mostly everything or high average. Although attention was seriously lacking. If she had been able to maintain attention she probably could have scored higher. Maybe she will help with my other daughter:)