Dear @TFICoffeetime, I am so sorry for all the nasty replies you have had. Perhaps those particular responders have all had a shitty day/week/life, and needed to take out their aggressive behaviour (there is nothing 'passive' aggressive'about a lot of the PP's replys) on an anonymous woman who appeared to be vulnerable because of how understandably upset she was by the inexplicable behaviour of such close friends?
(I hope that the PP who seemed to not understand that the word "close" can be legitimately applied on more than one type of occassion, was just being another horrible poster, otherwise her mummy should not have left the PP unattended while using her phone.)
If no-one else had asked for clarity after your OP, FTI, I would have done so, because, as you have since admitted yourself, it had some typos, which made it difficult to understand. But, I would have hopefully asked you in a kind and gentle way, including explaining that I could see how upset their behaviour had - quite understandably - made you.
I wasn't at all surprised that in a heightened state of anxiety, you had made some slip-ups. Also, at least one of your children had been upset by your "friends" behaviour, and anyone upsetting my children is something which makes me feel both sad for my children, and very angry, that anyone would either purposely, or even thoughtlessly, say or do something so nasty. Which I am sure would make my post a much more jumbled mess than yours, and I have not got Dyslexia!
The important thing OP is that you admitted to your typos as soon as you could after they were pointed out to you, which sadly was mainly in a very unfriendly manner. The fact that you were kind enough to keep on explaining the timeline to PP's, who had to be either very bad at comprehension, or just the sort of people who thrive on kicking someone, even when they are already on the floor...
As for your actual query OP, I think that if they - the other family - reacted, somewhat belatedly, to your lateness (which you had kept them informed about and which wasn't ridiculously late anyway) by punishing you for that lateness by changing their plans for sharing a meal with you, then at face value that is rather pathetic, especially as they didn't even explain to you why they were apparently annoyed/upset about it.
You have told us that that sort of behaviour was not how your friend would normally react, so it has made me wonder (but I have not come to any positive conclusions @Raven85) whether something else was/is going on in her life, something that has made your friend very stressed? Perhaps she only found out about it on the day you met up, or maybe it is something that she is not ready to share even with you her good friend? Of course she might have just started going through the peri-menopause, and she could be one of the very unlucky women who have a particularly hard time of it, if it is the peri it is possible that she hasn't even realised that herself...
Good luck in trying to find out TFI, whilst hopefully, in the meantime, giving her the benefit of the doubt. I am quite sure that you will ask her sensitively, as you have come across as a lovely, and considerate woman, who has really been put through the wringer by far too many of today's Mumsnetters. 🩷 🌸