Anyway I have additional info..
I solved my first problem
it seems that if you set “Global post template” option with “right” then “global post sidebar” set with right sidebar the sidebars will appears twice.
I removed the second option and now it works correctly..
I think it’s a little bug…because I think the first option specify just the side of sidebar then, the second wich sidebar put into…instead the first one already put the sidebar inside (for pages works correctly)
Anyway could you help me with my second problem? Why categories doesn’t show sidebar?
If you still need I could make an account, do you need administration role or could be editor?