Problems splitting a document by Bookmarks

Hello !

I am tring to split a document with 121 pages into individual one-page PDF files with each filename drawn from top-level bookmarks.

Each page has our company graphic header, and then some text. The first line of text (addressee company name) is what I am using for bookmarks. Each is unique, no dupes. I created each bookmark manually by highlighting the text and bookmarking it.

Problem is: it does indeed create individual files, with bookmark text as filenames, but ~50% of the time its the incorrect page, so that, for instance, a file named "Company A" has the text body of "Company B".

I am stumped as to how to fix it..have tried a few things. Is the bookmark not being at top of page causing ambiguity as to how to split ? My next guess is to somehow move the company graphic down, and somehow get the company name at the very top of each page...then use white font color so its hidden, but still useable as a bookmark. Or is there an easier way ?