I think that was what the tongue-tying in Grimmaud Place was for. But yes, it is definitely a weak point. And I think it is caused by Rowling knowing Snape is a good guy. She is usually very good at covering those tracks, but I think it slipped here.



Well, the big question is whether the charm hid them or their house only. From book 2 I assumed they themselves were hidden. If they had been their own secret keepers, then that would have made it impossible for them to communicate with the outside world, and so they could not have told anyone the secret. I think that is one of the main indications in favour of the Potters themselves being hidden. There are of course explanations for why they might have used someone else for the job even if what was hidden was their house, I suppose. I think it was discussed in the re-read of the first book.



Yes, this is weird. I have been wondering about the same thing. Could it be tied to the worry that the trace could still be on Harry? Although I suppose not, as I think they keep doing it after Lupin has punctured that theory. I think they cannot all walk under the cloak at once, as they are now all grown and tall.





Hmm. People do show up at the ministry just as Harry is shouting Crucio. But I don't think so, because nobody ever objects to Barty Jr's use of them at Hogwarts. Still, it seems like it would have been a good idea.




Ah, yes. I knew it came later, but I wasn't sure where. She must have looked it up after her problems with the mouldy bread.