The same thing happened with Elayne (but this was more confusing, and many people didn't even notice it...). She was on a different timeline in her scene with Egwene (post reunification) than she was in her scenes with Mat. That's why she never refers to the Seanchan attack or the reunification of the Tower in her scenes with Mat, or why she didn't think of the BA purge when she went to the dungeons (and why the BA were still there, and Egwene had not sent for them and executed them). It had not happened yet, it was weeks before. When Joline and co. left for the Tower, the reunification was still upcoming, and the rumour it had happened was wrong. When they arrived to TV, it had taken place for real.