So, if those with immunity are ranked in the bottom two, will the people above them be placed in the bottom two instead?
Exactly
I did that in S2. I was immune and doing so well and then uni hit me and I semi wanted to stop playing. I got so busy the week of my immunity that I didn't send. Super ended up going (we didn't have bottom 2 in Season 2). Definitely learnt from my mistake. That's why I refused to join LA4, because I wanted to give my all into it and not do a half-arsed job of it.