This is the other Leaky door I'm talking about in that nook between Screen and Sons & King's Cross:
The only thing that confuses me is that we've seen a similar doorway inside the Leicester Square Station, to the left of the place where we enter:
Here's an older picture from AllAroundOrlando for better reference:
Well, you beat me to it. As for the internal door in the bottom shot (which I posted a pic of, too), I totally understand that. It's the door that leads from the back/inside of LC out to the courtyard with the brick wall that magically opens to reveal Diagon Alley. What I don't understand is why that first picture you posted has the same door, as if that is the hidden entrance to the LC. It makes sense to have the LC set off like that, but it seems a little far from the internal door that we see in the very bottom picture. Also, if they are planning to add a record store front under the Leicester Square arches, you have to have the door between Screed & Son and Leicester Square, not to the left of S&S as in that top picture.
It may be that they simply didn't like the look of it, as Teebin suggested, and they are moving it over next to Leicester Square. Either that or they just didn't take the whole record store thing into account in the original design. (I'm still holding out for a record store door & sign just to the left of the Leicester Square marquee.