The second picture led me to thought the same about target channels, but somewhere I have read that S-400 can track (I am not sure, will try to find it again) 32 or 64 targets (and I think this was valid during preliminary testing, it can be more in production units).

But on the other side I can not imagine how a few people can handle so many targets (in case it does not work like Patriot in full auto mode).


However your finding about a "mysterious missile type" is very interesting