Nice pictures! Looks like a gorgeous location.
Let me try and diagnose the problem and point to a possible solution.
In principle pads work well to keep you warm in a hammock. But they don't work like they do on the ground. The BA system puts the pads right under you which is perfect to keep you warmer than the cold ground. The hammock typically wraps around you a bit and your shoulders get cold. Is that what happened? If so then the issue is that you need a wider pad, or perhaps just some pieces of pads to put in strategic locations.
The other problem I can see is the 3/4 thermarest. That means that 1/4 of your BA insulated aircore was exposed to the night air from underneath. This insulation in the BA pad is good, but thin. Once there air inside is cold you will begin to feel it.
Here's what I suggest. Ditch the air pads. The air is just for protection from the hard ground which isn't an issue in the hammock. Use a full-length CCF pad (like a ridgerest) inside your BA bag and get some additional pieces of CCF for your shoulder areas and perhaps your hips as well.
That would be my strategy. It should be good down to the temps you are talking about.
Hope that helps.