[thaumasiotes]

> The last map seems to show several houses on that street with same numbers, because it looks like on the west side of that border the numbers go up to 443 from west to east, and on the east side of it, the numbers go up towards 443 from east to west.

It's weirder than that. On the odd side, Bolton counts up to 443 and then, as you cross into Manchester, Manchester counts down from 443. But at least the progression of numbers makes sense.

On the even side, it looks like Bolton counts up to 538 (which is directly across from 443) and then, once you cross the border, Manchester counts down from 408 (also directly across from 443).

Why are the even numbers so disconnected from the odd numbers?

[timthorn]

As a general rule, even numbers are on one side of the street and odd numbers on the other. Some more details here: https://en.m.wikipedia.org/wiki/House_numbering

[thaumasiotes]

Yes, I'm asking why 443 in Bolton is across from 538 rather than 442. It is not a general rule that the sequence of even numbers is completely unrelated to the facing sequence of odd numbers. They're supposed to be equivalent.