Yes, this is very surprising. Perhaps during 40+ interviews he let one slip. But as you say, I would think he would have an agreement to exclude future product references in the event Steve did let one slip.
I wonder if Steve would be still alive today if he had cancer surgery right away. From what I read on this site the cancer was just in his pancreas at the time of discovery in 2003 and had spread to other organs by time he had surgery 9 months later.