When I pick up my accordion and put it on, the first thing is that when I put my fingers on home C bass and C major the sounds are very high from some other register. When I hit, what I call, the main register stop it corrects itself and no further problems. I have to go through this routine every time I pick the instrument up to play. Could it be that something is sticking when I set the instrument down? It is a used Crucianelli Pancordion. Thank you in advance.