Grand Staff Question?

Why is it if you open a Grand Staff and you write a middle C 1 ledger line below on the treble Staff Clef then write a B below it. It does not go automatically on the bottom Bass Staff Clef?
I have Multitrack Studio also on my iPad and it behaves the way you'd think it should. Grand Staff split at middle C.( notes below middle C go automatically on the Bass clef staff.
Why isn't it this way in Symphony Pro (iPad and iPod)
Please someone find time to answer this question. Thanks

OSX El Capitan Ver 10.11.6
IOS 13.4 iPad Pro 4th gen.