Why Ayu singles are not charting well in World Chart

[slowmoth]

I was doing some listing in wiki and I found out this...

Look BLUE BIRD was released in 2006.06.21, the first week it sold 160,572 copies, if you look at the chart of that week you will see it doesn't appears, if you go to next week chart it neither appears.

It's strange because they listed some of her singles in the past, look I listed them in wiki

The thing is that BLUE BIRD deserved the 5th position and a lot of singles deserved a position too and the only reason that they didn't charted is because they weren't listed? So maybe glitter / fated won't chart too

If is something that I am doing wrong please tell me D: