Do You Have Nameless NPC Households (NotInWorld)?

Its a uni glitch from day 1, did you graduate sims in uni,i have about 30 of them blank, when your sim graduates 4-6 townies join the grad ceremony, then they end up in the bin without a last name. When they walk around lots they still have there last names when you highlight them, Like when i saw 1 i recognized graduated with my sim,read the last name, then when i went to other households section i typed in their last name.

If you are not going to use them you don't have to write their last name, you only have to write the last name in manually b4 you can move them into a lot. 

As far as them glitching the game, i have so many ea created glitches b4 uni to notice if any new is related to it,i leave most of them blank cause they usually have long last names