Nest Study creating 2 sheets out of a roll - why..?

[william]

I have this nest study, 90 parts (fabric patterns). The roll is 100m long. 
All of the parts should fit into the roll no problem, but it is splitting it into 2 sheets. 

Is there a setting that I am missing, or something that needs to be fixed in Inventor Nesting? 

File set attached. 

[william]

@AmyLiu any ideas on what's going wrong here?