Saying but Not Doing . Why?

I am a patient person but it has worn thin.
I have a lovely friend of many years who lives in a different city. We also have a mutual friend & tomorrow we're travelling to visit her.
Since months ago she kept asking us to come saying she'd treat us to Afternoon Tea. I said "Lovely but you don't have to pay for us. Will just be good to meet up & go out" She insisted, "My treat".
Fast forward to a few days ago, she messages me asking if I've ever eaten at 'Brown's Hotel'? I reply that I haven't but we could try it there. Next day, she seems to have changed her mind sbout that hotel & asks if I've eaten at 'Smith's Bar'? Again I say no but we could try there then.
Well.........the very next day she asks about eating at another cafe. I have a look & say "Yes please" She says she'll book it. I felt relieved as it was dragging out with lots of texts back & forth.
So I thought she'd booked it but next day she said it was fully booked .
Yet again she starts texting suggesting a different bar. I am now feeling irritated so I just said I'll book it & I booked it for us.

Well you've guessed she messages me again suggesting a different restaurant & by now I'm so annoyed. She completely ignored the fact that'd I'd booked the place she'd actually suggested & we agreed on.

So in my last reply, I said "I'm going to leave it up to you now as you know the area best x" I also suggested she could just surprise us as I'm not a fussy eater.

I have steam coming out of my ears as she replys suggesting a different place.

I haven't replied.
I'm really pi##ed off .
This has been since last Weds & she just can't seem to make a decision.
I didn't want to take over as she'd kept saying she'd book & it's on her.
Is this normal behaviour? It's like she's just saying she's going to arrange lunch but isn't really.
I keep mulling this over & cannot fathom out what's wrong. I'm bewildered.