Are they trolling us with no Kelley in the post IC shots? Not likely, but could there possibly be a combined IC/RC and she goes alone to a reward? Or perhaps she is putting on an academy award winning performance, pretending she's sulking and knows she's going home and needs alone time, setting up her surprise HII?
As it's been pointed out at MESS ...
The area I've highlighted and enlarged in the Screen Grab below seems to contain Kelley's checked shirt (shown in the image just below it). So, while it's possible that she was booted without it, I think that she was probably still around when the Post-IC images were recorded.