When trying to idealize SS on this puzzle, I get a pop saying "Setup not TYPE_CARTESIAN." This has probably already been noted.
That is definitely odd -- that particular error shouldn't be coming up in that situation. I have been able to reproduce it, though, and will talk to the devs about it at our weekly meeting.
Neither of these issues are normal behavior. I pulled the design piece away from the ebola protein and after Mutate All (Y) over 75% of the residues ended up being arginines or lysines. This has happened before: https://fold.it/portal/node/996185
Seems like Puzzle 971 might need some adjustments :)