Cue sends with Presonus StudioLive

I want to start using the Steinberg Cue Sends feature with my RM16AI. I was running Cubase stereo directly to the RM Stereo L/R. So I turned on the Control Room and set up my system with two cue sends going to 1&2/3&4 on the RM16 and the Master or Mix going to L&R. Everything works but listening to the cue mixes, they also give the Main mix, which defeats the purpose. Is anyone here using Cubase Pro 9.5 with a Presonus interface and using StudioLive? I’d really appreciate some help. See attached. Thanks very much.