Robocallers still beating Nomorobo

While Nomorobo has been great, it seems that robocallers have found a way to beat it.  Twice this week, I have received 2 simultaneous dial attempts from a known robocaller (2 different numbers).  Nomorobo zaps one, but the other one continues to ring through as a normal call would.  Also has the same V(letters and numbers) on the name line of the Caller ID.  So here we are promised a solution, and already the lowlife scum is beating it.  Something  has to be done to block multiple simultaneous dial attempts by known scammers