Rochelle wanted Mandana to go so she can meet Keith?

Rochelle was happy and wanted Mandana to go out so Mandana can meet Keith. If Rochelle is so concerned why isn't she trying to get nominated and get out to be with Keith?

Although Mandana is dumb for not realizing it's a task but Rochelle's excuse she made up in the kitchen was even dumber.

I agree with Rochelle that she was happy that Mandana left but it wasn't for Keith, it's because one more competition is gone.