"Half cousins are the children of two half siblings." This is the definition from Wikipedia.
Family Origins and possibly early versions of RootsMagic properly reported half cousins relationships. The current version reports half siblings as sister or brother or sibling depending whether the Relationship Calculator or the Relationship Chart is viewed. Both of these properly show only the common father or the common mother. This problem then propagates to various degrees of cousins without the half designation.
It is possible to infer the half relationship by noting the absence of a spouse at the top level. But it would clarify the reports if the "half" term could be restored to the reports.