Tony Tiger

I have a claim in for an increase to 4 already SC psoriatic arthritis conditions that was supposedly(still waiting for the letter) decided.  Status changed on one of my pending new claims.
1.  The claims were decided and I am waiting for a decision letter and can not get a strait answer when I call.  I moved on for the moment on this problem.
2.  I  next put in for several new service connections for other joints.  I submitted x-ray evidence for these.
3.  My question here:  Why would one of my new pending claims change from new to inc?  This condition(left hand) is not currently SC.  Is it possible that his joint was SC from my decided claim?  I did not put left hand in until 10/29 for my newly claimed joints.  Again still waiting on the letter for this decision.
The joint in question is my left hand(not SC).  I am however SC 10% for my left wrist.  The submitted x-rays with my new claims do show evidence of psoriatic arthritis involvement and change in the left hand and I made complaint of pain in the left hand at my last C&P in September.
I have some kind of weird fusion of claims going on here to complicate this issue.  A pending claim went to decision sent and no decision has arrived after 10 days.  Now it looks like some new(submitted 10/29) pending claims are changing to increases and I am not SC for these so I am wondering how you can get an increase for something that is not SC?