they updated it so now if they have more spy infiltration ticks they can penetrate through your lesser spy protection.
It has always been like that.. o.o
someone said it was new.
it was always like that, but before with the old spy system, u can use anyone's spy infil point to protect ur base since ur spy will fight with any spy that are stationed there.
then with the new spy system, it's removed.
but recently, the spy battle is re-implemented with the only change is the agent will only fight with the allied agents put on the OP/colony...