"Alt Gr" on keyboard becomes "LCONTROL" in controls menu (interfering with "Ctrl")

When I want to assign the right "Alt" key with the text "Alt Gr" to a function in the controls menu, it's displayed as "LCONTROL", just as the left Ctrl key. This way I can't use it as long as LControl is sprint. Seems to not be related to all these "can't type @"-bugs, I can type @ (by pressing "Alt Gr"+Q).