no, the statistics info reports the aMuel clients that are connecte to you at that very moment. not the aMule clients in the network. i repeat: the aMule clients that are either downloading from you or to you or in any of yorqueues (or you are in his queue) AT THAT MOMENT.
so, if for one chance you have no aMule clients connected to you... that's not a bug

Greetings!