My point is that there are more than 5 LTWs for a given set of traits. Try this: go into CAS and view the new character's personality. Note the LTWs offered. Now exit the personality screen without choosing one. Open up the same personality screen and you will likely see 1-3 different LTWs offered compared to the first time.
Because it's advantageous not to repeat a given LTW within a legacy, or at least optimize a sim's choices, I thought there was a way to have more control over the LTW (at least to permit a parent to work at home). I'm stuck with a none-too-bright World Renowned Surgeon with Hates the Outdoors, Never-Nude, Friendly, Good Sense of Humor, and Family Oriented. Not Bookworm, Genius, Workaholic or other traits recommended for success in this LTW.
There are often other LTWs suggested before becoming Young Adult, but without knowing the final trait, it's hard to know if one of those early ones should be chosen. I figured the Legacy gurus know something I don't, which is why I posted my confusion here. Maybe in the future I'll just leave the Family Trait until last, so I will know the first four traits when early LTWs pop up as wishes.