Laura, that's one of the many problems with HV, they all seem to give conflicting advice. I've just tried to be led by G in a way, we're doing BLW so it's perhaps been less of an issue because she joins us at mealtimes and initially most food went on the floor (and often still does!). You can always try cutting back on the solids a little bit and seeing if they take that bottle better and how it impacts. Are they hungry when they wake at 5am? G is still feeding then or sometimes earlier in the night and is then up at 6am.
Catherine might have some good advice because B was a massive fan of solids early on and it was impacting upon his nights. Certainly introducing solids here led to a bit of unsettled ness at night initially but they have helped her reflux no end now.