I've reduced a much more complex real-world problem to this simple testcase. My objective is to sort by most recent year SUM ascending (most negative to most positive):

Thinking I understand the docs

I count the 2005 column as column 3, but here's what happens:

Hmm. Let's see what happens if I try by column 2 (the 2004 sum values):


The first one may be accidentally right, but the second one is clearly wrong and no different. So, let's see if we can invert the "cat" sort to descend:

Finally,_ROW_SORT_ORDER works as I expected. Too bad that's not what I needed to do.
I must be missing something painfully obvious here, but ROW_SORT_ORDER does not seem to work the way I need it to. Is there another way? Or what is it I'm missing?
FWIW, this is what Excel I'm running on Win11:

Thanks in advance for any help on this!