so imagine flipping that switch back and forth -- or better, imagine that I'm in front of you flipping it back and forth, but you don't see the state of the switch, and your neurons are biological sometimes but sometimes simulated (it's just a hypothetical, this isn't an actually possible machine). You can't even tell the position of the switch. You feel and report pain the same way, consciousness too. Would you really say that when the flip is switched to simulation, you don't really feel what you report feeling? Of course not.
I think it's illusory to talk about the direction of time. The reason we do it this way is causative. The reason I say S "is feeling" pain is if you continue to simulate the next few quadrillion states, it ends up expressing/feeling those subjective feelings. In another sense the tense we use doesn't matter at all.
I'm not sure what you're saying about privileging numbers - what does it mean to privilege a number?