Just read through the whole thing. Seems like this is a very major change from what I've always done.
Made my first tithing and offerings donations in 1968, as a very young member, and those were the old handwritten receipts that the bishop himself would write up, after you gave him the money and told him what it was for, all the categories common through the years were there, missionary, welfare, and a few others under different names. Tithes and fast offerings were always first.
The first computerized things came next in 1970. You would put the offerings and a slip in an envelope, and a week later would get a bluish printout a week or so later when you went back to Sunday meetings. About the same categories. That lasted in various forms for many years until the first version of the more recent receipts came out, the ones with the carbon copy you could separate and keep as your receipt.
I think what we have going on also is member desire to donate to a number of other things, and there's only so much space, and they (other than the foul-up noted here) don't want to have to go and revise it and potentially waste a lot of paper receipts that wards have gotten in sometimes only days before the new version comes out. Also, having all the other categories grouped under 'Other' covers things should they introduce a new category.
But still, there's going to have to be a major education effort to show members how to do things given this is a major shift, probably for about 85 percent of the members they've never known anything else other than a slip that has a variety of other categories besides tithes and fast offerings. Missionaries too, because if you look at Preach My Gospel, one of the things is that a missionary can show a progressing investigator how to pay tithing and offerings before they actually do it.