Do we know enough about Justin to say whether or not he was a hypocrite? I think our impression of Justin is formed from what Flora said about him, since we do not see Justin as he was before the great change in him.
As for Josette, I wonder if she herself was the cause of the lack of warmth towards her from the Collins family. Maybe she was told about the Room and reacted negatively, and persuaded Barnabas of the correctness of her opinion.
In any case, I'm sure that the Barnabas and Josette of parallel time are different from the Barnabas and Josette of our time band. PT Josette mentions Barnabas's dark moods, and I don't think dark moods were a feature of pre-vampire our-time Barnabas. What bothers me about PT Josette is her voice. Kathryn Leigh Scott has a lovely, distinctive voice, and Mary Cooper's voice is completely different. I doubt the aging process would have changed Josette's voice so much.