Yes good thought but I did remove the splitter when I disconnected the adapter and had the coax directly to STB. That STB does have 2 splitters though well actually 3 if I add the moca Adapter back. The main one that stays solid only has one.
My current settup is as followed
1)coax from ONT to moca Adapter (Ethernet From router to Adapter for internet)
2) splitter from Adapter with one going to main STB other going to splitter for the bedrooms and now 1 more splitter in bedroom for other moca Adapter.
Everything works fine right now just an annoying blinking lol. What do you mean by levels issue?