Have I messed up my Dado rails?

I've been installing dado rails in my Edwardian terrace after having the full house plastered. I'm worried I might have made a mistake with the heights on the staircase and landings, as seen in pics...

I measured just under 1m from top of skirting in hall and landing, and the same distance perpendicular to the skirting on the staircase (making the join at the point of intersection).
Having seen other photos online, it looks like the rails should be lower going up the stairs, i.e with the 1m measured from the staircase treads themselves?

The trouble with doing that, on the left hand side of the stairs going up the rail has to be higher than the bannister? I've got a pic of what I've done there (which incidentally looks like what had been done before when I saw the original 2-tone scheme under the wallpaper before plastering..)

Any advice appreciated..

This was my thought as well although I'd have said 1978 was more accurate. Who the hell puts dado rails on their walls in the year 2018?! Just rip it off and install a nice modern bannister if you must have something on that wall.

There is no right or wrong way to do dado rails. The choice is either having the slope at knee height alongside the staircase in order for it to be at the 'right' horiizontal height along the walls at the top and bottom, or, you do the slope at the 'right' height alongside the staircase but then you have to 'overrun' it well beyond where the top stair and bottom stair finish to get the 'right' height along the wall, otherwise the horizontal section at the top is at knee height and the section at the bottom becomes shoulder height (if that makes sense ).

It's a bit high, but look at it this way, no-one will notice. You should measure up from the floor on the level and the nosing line on the staircase.
It has to be said that I don't think they ever put dado up staircase walls back in the day. I get the feeling it's a modern thing as it was originally confined to the ground floor rooms because it was to stop the top rail of the chairs from hitting the wall and spoiling the decor.
There are a few other things which don't look right there too, so I wouldn't worry about it!

L

Yes, the 4th pic in particular is a dogs dinner

my last house in London (victorian terrace, unmolested since the 60s when I bought it) had dado up the stairs and along the landing

The 60s is modern compared to his, he said it's Edwardian.

That's just wrong.