NOTE: Due to excessive amount of forum spam attempts we currently screen all forum subscription requests. To register for the SintraWorks forums please email firstname.lastname@example.org, supplying the user name you would like to use and just a word on why you want to subscribe or how you intend to use the forums.
Do you see all the pages in the pages list? Make sure that you view the document by its media box (Tools->Draw->Media Box). Maybe the crop box gets sized inappropriately after the split (if so, you may want to resize it).