Is this an oversight? It means that even if there are more than 32 graphs, they’ll be completely ignored by the Seeker.
The last bit (bit 31) will control the settings for all graphs from 31 and upwards. It only allows 32 because it is much much faster to pack everything into an integer. If you need settings for more than 32 graphs, you can subclass the NNConstraint class and supply your own SuitableGraph method.