Did anyone notice this?

In season 9 episode 17, Albert is addicted to morphine, blah blah blah, you know the story.. then at the end the narration of Laura comes, and she says "a few months later he came home as Dr. Albert Ingalls.". But in The Last Farewell, when Albert catches a blood disease and at the near supposed ending of his life, he says "I would've made a good doctor too.". This has been bothering me for so long. The timelines are wack.