I've tried to log back in to the forum using my previous account 'Guy_H' but I was taken to the webkey login. I didn't think this forum required me to use my Webkey account? has something changed?
Looks like you have always been typing in the username and passwd correct so far
One time mistake in the username or pwd and perhaps it took you to the scary webkey page:
Did you try the go back link or press the Back button on the browser and try login with the old username. It should still be available.