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On the screws, if they tighten up ok, it will not matter if they are slightly bent. The solder job holds it laterally, the screws are just to apply pressure and hold the pad tight to the receiver.

I’m honestly not sure. I’ve be never done the job myself, just seen it done.

the pads are both soldered and screwed. Normally you would snug the screws, then heat the pad until the solder flows (it's just lead solder), and as you play the torch over the pad (a second set of...

I would debur carefully with a needle file, shoot it, and if it groups well then it’s good enough.