Maybe because it was bullshit.
Thankfully, Karen and Matt both pointed out that the choreography is NOT theirs, they are given it. They were also given the props, they didn't choose what to use and how many to put into the routine.
What Jorgie was given to do, she did it 100% correct as far as I'm aware. Had Matt not caught the ribbon, or she tripped on it, or a lift went wrong, or the ribbon failed to flow, then fair enough. None of this happened - so what's with the *scores?
It may not have been as good as Chemmy's or Chico's (all subjective), but I think only Katarina explained this. She said she had marked them 8.5 because she preferred Chemmy's and Chico's routine which is fair enough in my opinion. Louis, however, blamed the choreography which isn't Jorgie's fault, so it is unfair to mark her on it.
Edit: *I think 8.5 was fair from Robin and Katarina. By scores, I meant Louis' score in particular.