suddenly alt+shift+right doubles note duration instead of lengthening by grid value. I deleted the shortcuts both for Double duration and for Lengthen by grid value, but alt+shift+right still doubles the duration even if the shortcut IS deleted.
If I try to assign alt+shift+right to some other function, the system says that the shortcut still is assigned to lengthen by grid value (but it does not show up there anymore). If I try to put it back the system says that it is assigned to Selection and Navigation>.
What shall I do?