Figured out the syrup situation. My brother knocked the bottle over when he was doing the dishes last night, and it sat sideways for about 10 minutes, but nothing spilled.
BUT – that ended up getting air in the pump and that air must have forced out the syrup as it was trying to escape. (There were still a few air bubbles in the pump when I made my coffee this morning and I thought that may have been it later, but couldn’t figure out how.)
So, no coffee drinking ghosts.