duplicate bettween two scrollview

[TrungVu37]

I have 4 major tabs in each tab, I insert 2 or 3 small tab , and then I started flip, the small tabs tabs not be made that big jump over the right tab . how to fix this

Project demo: https://www.dropbox.com/s/mmq5umaxq6r6ka5/PageMenuDemoStoryboard.zip?dl=0