sounds about the same as my dd2. I thought I'd cracked it with dd1 as she slept through from 8 weeks old. I did everything exactly the same with dd2 but it didn't work. At least (as I consoled myself) she does go back to sleep after a feed as opposed to ds who would then be wide awake.
She is 8 months now and can sleep through from 7.30 till 5am - but not all the time... Sometimes she still wants a 3am feed.