The bridge of an acoustic DB sits on the top between the f-holes which makes that part looser to vibrate, specially if the soundpost is farther away from the bridge leg.
The Palatino is not wide enough to make the top at the bridge legs loose enough, so it act similar to a soundpost that is too close to the bridge foot. Clamped instead of loose enough to vibrate well.
Well, it‘s a Palatino. You get what you paid for. The Italian MK Jazz has a kind of soundpost, but it is a lot more expensive than a Palatino. Good EUBs are rather expensive.
Two element pickups can sound a bit strange because of a light phasing, but better if both sides alone sound rather different but is still better than a good sound with very different volume for the strings.
BTW, you might want to (impedance) buffer each pickup individually before mixing them. You will get a better sound.
So you might want to go with two single pickups instead of a double one.
Good luck!