Some people just oversell it, or don't think of the whole spectrum of commutativeness scenarios when they write about FP. I give several examples of that, lower in this thread, with links.
And it's exactly the same thing that the author of the original article discusses -- that order was supposed not to matter, but it does.
And it's exactly the same thing that the author of the original article discusses -- that order was supposed not to matter, but it does.