Check this thread:
https://www.mobileread.com/forums/showthread.php?t=27627
There's a link in the first message for a metadata editor for PDFs and I just tried it on a book where the title was coming up as "Layout 1" on the Sony Library software, Adobe's Digital Editions and on the Reader itself (only Calibre showed it with the proper title in it's library listing, but even using Calibre's metadata editor, I wasn't able to get the Reader to recognize the proper title.)
Anyway, I downloaded the software from the link above and within about 30 seconds after the software finished installing, I had the book retitled and showing up properly in the Library, DE and - after uploading it - on the Reader. Very handy!