Theory:SJA television discontinuity and plot holes/Death of the Doctor


 * Jo Grant forgot her encounter with the Eighth Doctor in the 90s (Genocide), although the nature of her encounter involved the creation an alternate timeline.
 * Novels aren't canon, especially if overuled by a television show.
 * Wouldn't Sarah Jane object to Tia Karim being in her attic and seeing Mr Smith. Previously she didn't want UNIT to know about him.
 * She may have become more lenient, seeing as she has had numerous contacts with UNIT (During the Horath situation, Dalek invasion etc.) Also, seeing as it's evident that UNIT are aware she runs a anti-alien-invading force, that she's bound to have technology in there. But they aren't Torchwood, so they might let her have it, perhaps even the Doctor told them to leaver her alone.
 * She could have been so distraught by the news of The Doctor's death that she didn't think about them seeing Mr. Smith.