Earlier quoted context omitted.
> 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…
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
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.