Grand Staff note entry Question?

uncle808us

I sometimes use Multitrack Studio for iPod. And When I use the Grand Staff to enter a piano score  it automatically splits the Grand Staff at C3 and places any note above B3 on the Treble staff and any below on the Bass Staff. 

Why does Notion and some other iPad scoring apps not behave this way? 

(Symphony Reflow,and Score Writer )

 I'm wondering why. Thanks for any enlightenment.

uncle808us

That should read iPad ( auto correct screwed up again.)