Was I wrong or are my sisters just on a witch hunt again

So I have two sisters that, until this past weekend, lived together (we're all in our 30's). I am hugely different from them, always have been, always will be. I personally find them to be entitled, and they like to gossip about family.

My younger sister us the one who just moved out, we all helped her move so it didn't actually cost her anything for the actual move. My husband took a truck from work for the big things and our dad, who lives about an hour away, was going to come with a trailer that he rented and GIVE my younger sister a couch set (my mom had gifted her a new bed set as well as a daybed for moving out). We gave her a fridge that had been given to us when we first moved out so she was pretty well setup for a first timer.

Anyway, we helped on Saturday, even helped her unpack and hang curtains and clean. As mentioned our dad was going to come give the couches but he ate bad food the night before, PLUS he found some really young kittens that had been abandoned in his bushes so he was up feeding them every two hours. They were already complaining on Saturday that oh typical he wasn't going to come.

As a side bar, my dad and I also share a genetic condition that, amongst other things, causes bone pain and extreme fatigue. My dad is also a huge flake, I mean they should know what he's like by now.

So Saturday he never pitched up at all, which to me was fine because a) he was sick and had the kittens and b) I mean he's doing my younger sister a favour anyway. But they were so angry about it.

Sunday they got angry at him because he also never pitched, they got angry that he took painkillers at 10:00 in the morning and fell asleep. So my older sister asks me if we can borrow my husband's work truck again this coming weekend because my younger sister now is very, very upset that she can't get the couches and she's angry that our dad has kept moving the goalpost, apparently.

So I defend the man and I straight up said younger sister is too old to be throwing a wobble about this, people are doing her a favour, it's not even like they're going to use the couches because their TV is in their bedroom, they should know what our dad is like by now and frankly, I don't believe they fully understand what it's like to be fatigued (I've heard them make comments about me before). I did say I'm not trying to be unsympathetic but it's really not the end of the world.

Well that was two days ago and none of them have spoken to me since, neither did they reply to my last messages.

Was I wrong for having such a chilled attitude about it, because it's not my place so I don't understand, or are they being their usual entitled selves?