All true. But the signal only comes from the general direction of the warm Neptune planet, the only planet they know about in that system. The signal might actually be coming from another planet that’s in orbit around the star.
At this distance I doubt they could pinpoint the exact location of the signal from the solar system. It’s pretty good that they can pinpoint the system.
Having said that, the Russians sometimes get a little wild with their claims. There is a bit of “National Enquirer” in the Russian soul.