I havn't read the labels lately, but they used to tell you to dry mix the ingredients first as the active stuff can settle out during shipping. They will tell you not to over do the water as you can weaken the concrete by as much as 40%. Now that they all have these instruction to make appear easier or just keep up with each other, the home owners can be fooled into thinking a contractor is just following instructions. Now we see contractors fill a hole with mud and sprinkle a little out of a bag on top.
In repairing this kind of mess we usually order 1.5 bags per post and moisture in the ground is a big factor. We got stuck with rain storm right after setting posts and the next day found non were exceptable and pull them all.
I would insist on knowing how many bags they are bringing and insist on premixing.
Villa; I might start to enjoy this. Place smile here.