In Mark 8:18-21
18 Having eyes do you not see, and having ears do you not hear? And do you not remember? 19 When I broke the five loaves for the five thousand, how many baskets full of broken pieces did you take up?” They said to him, “Twelve.” 20 “And the seven for the four thousand, how many baskets full of broken pieces did you take up?” And they said to him, “Seven.” 21 And he said to them, “Do you not yet understand?”
Some people (like the author of this article) are only familiar with little snippets of scripture. It is easy for them to draw the wrong conclusions without their having read the rest of the book.