How can I expand the amount of bodies, that I can differentiate with Astra Body Tracking?

I have an issue, when I want to track the skeletons and get the coordinates of joints, using Astra Body Tracking SDK. Running samples (actually SimpleBodyViewer and BodyReaderPoll ) I noticed that it can’t track more than 2 skeletons. but sdk sees the other bodies ( without joint tracking ). My question is: HOW can I expand the number of skeletons(number of joints) to track in this samples?