Post by OCI edited cmdline.txt, removed user=glenda, but it still logs in to it.
If you type 'ps' I think you may find it is now starting as user "none",
which is the default if you just hit Return for the "user" prompt.
There is still some flakiness in the raspberry pi usb keyboard support,
and in particular it's possible to get spurious auto-repeat behaviour if
the driver misses a key-up event. So if the Return at the end of your
response to the "root is from" prompt gets auto-repeated, you won't get
a chance to enter the user name.
The hacky workaround (sorry about this) is to hit the backspace key quickly
after entering your response to the "root is from" prompt, to break off
any auto-repeat.
The usb keyboard/mouse driver really needs to be replaced altogether.
An interim improvement might be to have a way of disabling auto-repeat.