[L&D] Another Edith after watching Static TV

I have a second Edith (always with random last names, can't you give her and Alice an actual last name that is hidden when interacting with them in game if you give them last names in the manage household screen?)

This second Edith must have made her entrance when I had sims in a club gathering Watch TV, and they all decided static was the way to go.

Is this, generating more than one Edith, as intended or bug?