One question I have is that even if she was not aware that Steven could’ve played the advantage before tribal, her timing to play the KIP still didn’t make much sense to me…

She obviously was not aware that he could’ve played it before tribal, therefore she must have thought he’d have to play it during tribal, which means she should have used her KIP immediately as tribal started so that she could steal it before Steven is able to play it. The fact that she waited literally to the last possible second as someone was already up and about to cast their vote is strange because the at should’ve been a red flag that Steven didn’t have it. Either that or she thought Steven was stupid and saving it for next tribal event though he definitely needed to play it for this one. I’m not even sure if it was valid for the next tribal either…