Hi Kristen.
I had esophageal dysfunction for quite a while with my ASS. I was told by my neurologist that it can be normal, as polymyositis can affect EVERY muscle in the body. I still have minor issues, but as I got better treatment for my Ass, it did in fact improve, although it is not perfect.
Your weak fingers could also be the myositis. Again, according to my neurologist, who is my lead doctor for this, ck levels are just an indicator, but muscle weakness can still occur without raising ck levels. That is the biggest problem with this disease, nothing is "normal" yet so much can happen.
I have also learned that once a person has an autoimmune, other autoimmune disease (like scleroderma) are more likely, or possible.
God Bless and Keep up the Good fight
Wayne