Complex sentence: EFF also have members of South Africa First (SAF) in the list who hold dual membership, this is despite the fact that SAF has not yet formally agreed to them being on the EFF list, but its leadership collective has endorsed the lists.
Split into simpler sentences: EFF also have members of South Africa First (SAF) in the list who hold dual membership. Although SAF has not agreed to them being on the EFF list, its leadership collective has endorsed the lists.