It is definitely annoying when they stock so little of whatever is on sale. Our local Albertson's store, however, always gives us a rain check for whatever they're out of if we ask for it.
The problem here is they don't stock enough period, in most instances the diet in the 24oz bottles is gone the same day whether it's on sale or not. Safeway stocks 6 sixpacks, Walmart stocks 8 six packs, that is all the space they allot for the diet.
Walmart is terrible anyway. A new Market Basket just opened up here, and I will be shopping there from now on, I think. They have a much better selection, and I think their prices are comparable with Walmart.
We live in Podunk, we have to drive at least an hour to get any other choices which is why we're looking to move back to civilization.
I don't know about how the Walmart in your area is, but in my area the market is just okay. They really don't have a very good selection when it comes to meats and different cuts, and some of their stuff is not that cheap either.
If you've ever been to a Super Target you'd know it's like comparing a Waldorf Astoria to a Motel 6......... That's how much better the Targets are though they tend to be a little more expensive.
Also when we were down in Santa Fe on Tuesday we went to both Walmarts and the super Target, none of them even carried the Diet Mountain Dew in the 24oz bottles, according to someone we talked to there's a single family in the area who decides what gets stocked and what doesn't.......... If NM is still locked in the old west "cattleman" era where a small number of huge landowners control everything then maybe it's not somewhere I want to live.