Why did BB grant Olivia immunity when she completed her silly little secret mission, but Noky & Trish don't get immunity for completing theirs ??. How is this fair?

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Again BB is being inconsistent .... and they've thrown Noky & Trish well and truly under the bus for drama . Anyone with half a brain knows they'll be up for eviction now after the chaos and aftermath of the possession task. They both have massive targets on their backs now.
BB was happy to protect Olivia and gave her a week to relax and sit back , but Noky & Trish have to face the music.... and worry about their fate now ?. double standards and smells of rigging

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Especially when Olivia's mission was easy as pie , and Noky & Trish's was more difficult and would cause eruption. BB really is evil and has clear favourites .