I have a relatively inexperienced colleague who is unfamiliar with analog switches. Their experience appears to be limited to logic totem pole outputs, which of course you do NOT parallel. They freaked out a bit when they saw that I had put two sections of an ADG1409 in parallel to lower on-resistance. I would like to get confirmation from an ADI applications engineer that this is, indeed acceptable. They also believed that all of the unused mux outputs and inputs must be connected to ground, in spite of the common being connected to a valid signal. Again - thinking of CMOS logic inputs that will oscillate if not connected. Perhaps a bit of clarification from ADI would help clear up their confusion.