So JJ told Josie that Nathan was really angry with her last night for rolling her eyes at him. On Josie asking Nathan if this was true, Nathan replied he had no idea what JJ was talking about.
So JJ has done precisely the same thing as Ben.
Remember when JJ went mental at Ben for nominating a friend? (Sunshine) JJ then did exactly the same thing days later by nominating his mate Ben. The difference being Ben nominated Sunshine after knowing her a few short days, where as JJ knew Ben for weeks!
JJ complains now that Ben is a liar and untrustworthy. I say JJ is every bit as much a liar and untrustworthy, but also add hypocrite to his list, as he seems to keep proving time and again.