When I eject my Kobo Touch from my PC running Calibre it continues to display "Connected and Charging" for a while even after actually disconnecting the cable. I assume it actually continues to charge while the cable is still connected since the actual USB port doesn't power down... I also check the widget on the taskbar to make sure it is actually safe to disconnect the cable, just in case the software does not disconnect. It seems rather easy to corrupt the Kobo sqlite database, so take care to be sure it is disconnected or be prepared to delete the database and set up the device again.(mostly enter email and password and it rebuilds the database.)
It takes a while after disconnecting either end of the cable to update the display on the Kobo Touch and indicate it is actually processing. This can take a while apparently depending on what the Kobo Touch is doing???
Best advice is to be patient and try giving it a little time to see if it makes a difference, within 30 seconds or so I'd say you'd see something. It may take considerably longer if the Kobo Touch is processing a lot of changes for all I know -it's far from lightning fast and does not immediately indicate processing. If not, hold the power switch for 20 seconds, then hit it again for a couple seconds to turn the Kobo on.
I realize you have a Glo, but I'd assume the process is very similar, perhaps a bit faster on the Glo due to the faster processor. I do wish they'd get that "connected and charging" message off the display sooner on disconnect of the actual cable so you'd know a state change has occurred.