The registrations at my collecting society show Sentric Electronic controlling a 50% share of my tracks. What does this mean?

We register your tracks at collection societies around the world. The rights are split 50/50. If you are a member of a collection society, you get 50% of your royalties directly and we receive the other 50%. We pay out the remainder of the royalties you are owed from the 50% we’ve collected on your behalf, ensuring you get your full 85%.