Fragments, with the same menu, on the same layout cause duplicated menuitem

I have a layout which has 2 fragments. These fragments uses the same menu, because I have another layouts that has only one of these (used in small screen device).

My problem is menu items of each fragments shows in the menu, and since they're from the same menu, they are duplicated to each others. I need to display only menu from one fragment, not both. Is there anyway I could archive this ?

Or, probably better, create 2 different menu. One for the layouts that has one of these fragment alone (which is used in small-screen device), and another one for layout having both fragments. How could I do this ?

Edit: I use ActionBarSherlock library for backward compatibility, and I test it on the Android 3.0 emulator.