Could you cite the text you are referring to?
Point a. seems pointless since anyway the socialist phase is the existing one and therefore States exists, we will be in such phase for a long time and we don't know exactly what the stateless existence will look like. Point b. is a misunderstood, since yes, States are the oppressing organ of one class over the other, but that in itself is what Marxists Leninists should strive for since we need to be in power in order to oppress the bourgeoisie.