yes there are 4 splitters off the wires out of the dish. My four (one from each) go into the SWM. The other 4 (one from each) run directly into his condo, so I don't know what is on the other end.
What kind of splitters are used here (power passing on one leg, diode steered, etc?) If they're power passing on one leg, who is supplying the power (you or the neighbor?) It would also be helpful to know what the neighbor has connected to their four lines.