Commentary:
Auda says she's seen him injured twice, but she's actually unaware of the time that Lubo got injured by Volker in Chapter 15. She's aware that Lubo fought Volker, but Mako healed Lubo up before he saw anyone else after that fight, so she didn't get to see the aftermath. Of course, Lubo isn't going to correct her now of all times.
Relevant Pages:
1-5, 4-1, 4-2, 5-5, 5-14, 6-10, 10-9, 14-3, 17-6, 18-1, 18-17, 18-24, 18-25