Glitch? Or something worse?

[Simmistress]

I had a couple move to an apartment lot, and when the time came for some visitors to welcome them to the new apartment, Madeline Despret was generated multiple times.  Before I realized this, she had the opportunity to speak to herself  --I returned to neighborhood, without saving.  Then, reloaded lot, waited--she regenerated again.  I tried "clearing" her off lot, but she stubbornly regenerated.  Returned to neighborhood, again without saving.  Went to her lot--she is a playable sim in my neighborhood--spawned RDC--got an object error--killed her.  Then, saved, returned to the original apartment lot, and she did not regenerate.  Was this a glitch?  Or an impending disaster?  I have good backups of this NH, so if it is asplode, I can deal with it. 

[J. M. Pescado]

Try using the Lot Debugger to "Nuke Sim Schedulers". Or just nuke them off the lot as they appear with the Ingelogical Shrub. The same sim showng up multiple times tends to be an occasional random glitch in the game.