Beware of CRAZY Shoppers!

So I have been working out the Albertson's diaper deal this week. I finally had it figured out and went to Albertson's last night. Of course they were all out of the the diapers that were on the deal. I got a bigger pack and went up front to see if it would work with the deal. After talking to the ladies in the front for 25 minutes it did not seem like it would. So they recommended I call in the morning and see if the right package size was back in stock.
This morning I called and they told me that they had just finished stocking the shelves. So I loaded up my children and went to the store. I headed straight for the diaper aisle. As I made my way down the aisle I could see a lady with her cart jam packed full of Pamper's Diapers in the Jumbo Size. The deal diapers! I looked up to see about 6 packs left in the size 3 which is what I needed.
I jokingly asked her if she was going to take all of the diapers.
CRAZY LADY: ya all of the diapers left on the shelf I am saving for my friend.
ME: Really I said, but your friend is not here.
CRAZY LADY: Well she just called me and she is coming.
ME: Well I am sure it wouldn't be a big deal if I just took three.You can have any of those other box packages.
ME: Well those are not part of the deal you know that.
CRAZY LADY: All I know is that my friend told me to come and get these diapers.

I went to reach for the diapers and she flipped. Trying to grab them before I could.
I managed to get two packages off the shelf and the ranting began.

CRAZY LADY: I can't believe you are doing this. I have been here for 1 1/2 hours waiting for these diapers.
ME: I am sorry but you can't just save diapers on the shelf.
CRAZY LADY: Well they reserved all of these diapers for me.
(If they did that they would have been in the back, she was such a liar)
ME: Well I am sure you will be fine you have whole cart full (the lower section and the whole basket). I really just need one more to do the deal. (I was hoping she would see how stupid she was being and give me one package) I guess I was hoping she would come to her senses.
CRAZY LADY: Well I need all these diapers.
ME: Well I need diapers too, (pointing to me infant in the cart.)
CRAZY LADY: I came here last night to get them and they were out.
ME: So did I.

Finally I realized she was not going to relent and I was not about to take any diapers from her cart so I decided I would grab a bag of size 4 off the shelf and move on.

ME: You know if you don't know the deal you are going to have to pay a lot more for those diapers, I will tell you if you just give me a pack of 3's. (I kind of wanted to see if she was lying about her knowledge. You have to buy the diapers in sets of three in different transactions or you will not get you $20 back.)
CRAZY LADY: Oh I know that you have to but them in sets of 3.

I started to make my way down the aisle I had sick feeling in my stomach. I do not like confrontation and it just was icky to me fighting with a grown woman in a grocery store. I turned around and said,

ME: I am sorry I upset you. I really didn't think it would be a big deal.
CRAZY LADY: Well I was just trying to be a good friend and get some diapers for my friend. She has seven kids.
ME: I think there will be plenty of diapers for her.
CRAZY LADY: Well I just needed the size 3. (She had multiple sizes in the cart)
I started to walk away and then decided with such a good deal maybe I should get some size 4. I turn around and she is putting the size 4 in her cart. I watch her for a minute thinking she might be about done b/c her cart will not fit anymore diapers. She starts to walk away and a couple of Albertson's managers come up to her and tell her that the deal does not work at all Albertson's that it is only some stores. That it was not advertised in there add and she begins her rant and I head off.
I debated, are they right about it not working here? I know that it worked yesterday b/c the employee's told me that people did it yesterday in that store. I decided I would try it and if it did not work just return the diapers. Three packages would not be a big deal. I went through the line and presto just like I read.....

Buy three pampers cruisers Jumbo pack size

Diapers 10 (with preferred card)
Diapers 10
Diapers 10

Used 3/$1 coupons and the Albertsons doubler.
Saved $6

Total 25.62

Got $20 back in coupons (vouchers to use at my next albertsons trip on groceries.)

Total cost

$5.62 for 3 packages a diaper.

That is $1.87 per pack or .05 a diaper

So you can see why the lady was so crazy to get diapers but really? Was it worth all of that rude attitude? Was I out of line? What would you have done?