It is disconcerting, but it’s more than that. This isn’t just a simple “mistake.” Someone at some point thought it sounded good to say that Jesus quoted more from Genesis than any other book and didn’t bother to double check it. There’s no way you get from the reality that only one of Jesus’ dozens of quotes from the Old Testament come from Genesis, or the reality that only 7% of his references to Old Testament books are from Genesis, to stating that Jesus quotes from (or references) the Old Testament more than any other book unless your intent is to deceive.