Blind Date Confusion?

I decided to play another Sim in my story, that hasn't been tested, previously. Oh, he's mentioned but I wanted to give a little bit of background for him. Plus, I'm also testing the house I built at the same time.

I took the elderly gent out to a bar just to explore this new pack a bit. He didn't have a great deal of luck, so I decided I would send him on a blind date.  Thing is, I thought I recognized the NPC Sim who was to be his date, but when he got to the restaurant chosen, I didn't see her. I had another look, and decided another Sim that was there must be his date. So, I had him chat with her. Nothing was fulfilling the goals, however. Then Ms. Mia showed up, late, and when he started chatting, suddenly the meter was going on the goals. LOL Thing is, he had a spark with Jaycee. I decided to try again. This time, he was at the Ho-Down? lounge in Crescent Ridge. Suddenly Joseph Cantrell was there, too. These two are related, but MCCC would only allow me to make the elder his father, when in fact he's Joseph's grand Uncle (brother of his grandfather). In all the time I wasted, the date was a failure.  Face/palm.

When next I play with the elderly and the first Joseph Allistair Cantrell, I shall try not to be distracted by the appearance of the younger Joseph. Boy, I certainly wasn't expecting that. To my knowledge, they aren't even int he same save, I didn't think. Wow. Now, I'm going to have to go back and double-check. Freakiness.