2 different networks with one orbi router

Hey everyone! I recently set up an Orbi RBK50 mesh system with one RBS50 satellite, and so far, I’m loving the speed and coverage. However, I ran into an issue: I connected the Orbi router to my local Wi-Fi provider’s router and then synchronized the RBS50 satellite, but now I’m seeing two different networks. There's my original local Wi-Fi provider network and the Orbi network. I was hoping there would be just one merged network. Is this normal? Should I try to merge them somehow, or is it fine to keep them separate?