Branches I worked on often seemed to have a bit of random sleeper spacing. Recuts were first normally put down during relaying, so the spacings would be correct for the length. If rails were trimmed a closure had to be inserted. I was on a job like that about 1967 where something like 15 lengths were done over a couple of days. at each new joint a few beds were opened out, not much ballast there in the first place, and two sleepers or three either side of the new joint were adjusted to suit. It left a few uneven spacings but nobody seemed bothered about an inch or two. The other interesting job like that is transposing rails on a curve to even the wear. Obviously one side is slightly longer than the other, so again a closure and a bit of trimming is needed.