Yes, that's absolutely correct, The Wall Street Journal printed this cartoon on December 18, 1997 and apparently liked it so much that they printed the exact same cartoon again a year later, on December 22, 1998. As one of my sons asked me in '98, “Did you get paid for it again?” I'm almost certain that the answer was no. So it looks like you owe me one, WSJ.
Actually, over the years, this type of thing happened to me on several occasions with other publications (but only this one time with The Wall Street Journal). Whenever it occured, I always chalked it up to either incredibly poor record-keeping or innocent human error. I can't imagine that any publication would deliberately want to repeat a cartoon that it had printed before.
Well, “to err is human, to forgive, divine”. So all is forgiven, WSJ.