The Beach Boys concert was supposedly taking place in San Francisco but where the Full House cast was on stage with the band was at a concert clearly at the Los Angeles Memorial Coliseum in Los Angeles, California, not San Francisco.
When the Beach Boys arrive at the Tanner House Al Jardine mentions that they heard DJ wasn't coming to the show.However DJ made the decision not to go just a few minutes before the Beach Boys arrived at the house so there is no way they could have known she wasn't going to the concert beforehand.
When trying to cheer up Danny, Jesse asks him what Michelle's first word was; Danny replies that it was cookie and Jesse says after that, it was dada and that Michelle looked up at Danny when she said it. However, in "Full House" (1987) {Daddy's Home (#1.6)}, a full season before she ever said cookie, Michelle first says dada while looking up at Jesse. She doesn't call Danny dada until the end of that episode, and she said it from her crib, not while looking up at Danny.