There is a new series "Newman'a Historical Sketches" ... the last I knew the possessive case in English still used an "s" as in "Newman's Historical Sketches".
EDIT: the error occurs in the series field of the library metadata - in all volumes.
OK, I must be blind (perhaps deaf too except that I'm listening to Handel at the moment). Do you have an URL for this? I don't see it. I did look at the Newman collection (BTW: If you're interested in that, you get a better deal by far if you order the Catholic Library Builder Collection (http://www.logos.com/product/10056/catholic-library-builder). Can you believe it? You not only get Newman at a cheaper price than buying Newman by himself, but you get a bunch of other stuff as well. I have a great deal of the collection, but still it's a better deal.
It looks like they've got an employee looking after metadata bugs finally: Hayley R Price has been making lots of updates lately to the wiki page where we report these problems (http://wiki.logos.com/Metadata_correction_proposals), moving stuff down to the section of "Corrections addressed by Logos". So I suggest you report it there. It's more likely not to get overlooked.
I'll report the issue.
But feel free to post the issue on the wiki page Rosie referenced as well, if you like. [:)]
This issue should now be resolved.