The snatching the cloth off Amy is so overblown.
She was acting like a petulant child - there was a general system in place (Annabel usually did the washing up after dinner, and had organised where she put stuff), and when Amy was made to asked ot dry up, she wafted over, said everything was wrong, went so slowly that she ran out of room to put stuff (to make a point, maybe?)
I think Mo could see that Annabel was getting irritated by the teenage sulk going on (Annabel will have seen her fair share of work to rule and point-making from teenagers 
) and jumped in to stop it all blowing up over something so stupid (and Mo was probably really irritated by the go-slow on Amy's part too).
I am aware that all of the above is only my view, but it goes to show how the heavily edited hour can be interpreted in different ways.
I think it has been particularly blatant the way that this whole concealer thing has dominated, and the footage has been of sniping and so-called bitching (seems to be discussion most of the time to me) forthe coupleof days before the voting begins. Clearly there was not enough controversy, and maybe votes were down because not enough people cared about anyone, as it had all been pretty bland - lots of trials won, not many that bothered by the creepy crawlies, no one starving and moral pretty high.
Voting to save your favourite only works ona large scale where there is a perceived injustice - people get up in arms, and jump in to 'right the wrong' by saving the person apparently in the wrong. Maybe, with everyone getting long better, the people in charge thought the voting might not go the way they wanted (as this whole thing is manipulated thorughout to ensure the 'right' person wins), and had to whip this up quickly.