You might be best to wait for davidfor's advice, but if you could try editing the books' metadata in Calibre to add the series info to the titles exactly as they appear on the Glo, then connecting the Glo and see if it matches the books (green tick). If so then while the Glo is still attached, edit the books' metadata again to remove the series info, then hopefully they will stay matched whenever you connect again.
Edit: You got it working while I was typing this
