When you Save something on Netflix instead of adding it what does that mean?
"Save" is what you do with movies that are not available yet on Netflix. Since the movie is not available yet, you can't put it in your Queue. Instead, you put it in your "Saved" section (which is right below your Queue; just scroll down).
If and when the movie becomes available, it will automatically be moved from your Saved section to your Queue.
You mean the green "Save" button? The green Save button is for movies that are not available on Netflix yet. Clicking the green Save button puts them into a separate Queue which is displayed below your regular Queue. If and when they become available, they will be moved up to the bottom place in your regular Queue (and probably your Instant Queue as well).
Go to your Wii's memory settings and go to channels then erase save data for Netflix. Be careful to not accidentally erase the channel itself though. When you are done, open Netflix, and it will ask you to log in. Also, If you choose to sell your Wii, be sure to erase the memory of your Netflix so buyers do not get to watch for free.