Rule/Sparkle

[~Inori~]

I have a question about Rule/Sparkle. I was reading this article on Tokyograph and they said that Ayumi is the first female solo artist and first female artist to have 20 consecutive #1s. I'm thinking that's not true because Seiko Matsuda had 24 consecutive #1s, so that means she also had 20 consecutive #1s. Then I looked at the Oricon article and translated it via Google and it said the same thing. So, my question is if Seiko has 24 consecutive #1s shouldn't Ayumi be the second artist to have 20 consecutive #1s?