WhyRwehwere, this is very good news, partly because being able to sleep right through the night is so beneficial, as you note.
As for the walking having got worse, you said somewhere else that he was very lethargic so presumably isn't exercising much, , so you are right: he is losing muscle tone and so doesn't walk as well. Perhaps now that he can sleep more at the right time, things will change.
Did you see my post about my new ability to sleep through the night after six years since sating abx and two years since finishing:
http://www.thisisms.com/ftopic-5185-30.html
Sarah