Obviously I'm only speculating but chances are the paper's are probably to help clarify dates the kids are with each parent. Like others have said, its not like Jason is spending all of his time in the US either. He has his show that is filmed in the UK AND he has had his girlfriend that lives in the UK. If anything, Olivia spending more time in the UK with Harry Styles might actually be more convenient for all parties. It could be Jason asking for more time since they may be around more often.

