PMing on the rejects.
Who bought kits 1 and 2? I've only ever heard of splave series 2400 cl8 once, and that was in the xtremesystems Haswell 5ghz thread.
I've seen that timing property on a different board before, my Z170 Extreme3. Your timings are heavily board limited, and you either need a better 4-dimm board or a 2-dimm board.