Split File by Bookrmark

[Andrei]

Hello, 

I'm hoping someone has additional suggestions. Is there a way to split a large pdf file by bookmarks, however keep pages with the same bookmarks into one file?

I need to split a batch of invoices into separate files for distribution. There invoices with the same number, but several pages. Currently, I auto-create bookmarks based on the invoice number (via a text file). Next, I split the file by bookmarks. However, I have to go back, identify the files with the same bookmark and combine them. I was wondering if there's a way to split by bookmarks, but keep pages with the same bookmarks into one file? Or perhaps someone found another workaround to a similar situation?

Thank you. 

Andrei