Maybe It's Me, But ...

I was going to mention this yesterday when I saw it in the Dallas Morning News, but I let it pass. Now here it is again today, this time right smack dab on the front page of the Metro section, down there at the bottom. The item in question concerns the Neiman Marcus Adolphus Children's Parade. There's a bit that begins:

"Admission: Free. Bleacher seats are sold out, but several blocks are open along the curb."

Now, to me, for something to be "sold out," it had to be offered for sale. Hence, was not free. Or am I just missing something here.