I count more then 3 "viscous"-craters.
I think, that these craters are from impacts in the king crater during the cooling down phase of it.
The whole king crater is full of typical "freezing - strips" (see the LROC strip).
It is obivous to see, that the king crater has a molten past (the crater is big enough to believe easily, that the "king impact" could melt the ground).
The ground of the king crater in this "freezing - time" is viscous and easy to liquefy.
Maybe that is the reason, why "small impacts" could create a crater, which liquefy the ground... they are cheating!