Empty staves in first system

I have the following problem:
my piece for String Orchestra starts with Celli and D.-Basses and only in bar 9 all the other instruments start playing. I want all instruments to be shown already in the first system (as this is a kind of a standard in professional scores?). But when I select this option, all the divisi staves show up as well in the first system, which makes no sense. How can I avoid that? What adjustment can I make in order to show in the first system the basic 5 staves of a string orchestra (without the additional divisi staves, which are only needed later in the piece)?

Would be thankful for any advise how to solve this.