Tiling a blueprint with rails and elevated rails issue

[fishpizza]

I have the following blueprint:

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

Copy blueprint

09-25-2026, 01-08-51.png (1.68 MiB) Viewed 230 times

Apparently both X and Y grid positions need to be either even or odd.
I want to tile the build cleanly on the concreted area (having the green dotted border overlapping the concrete), instead of one block above as it currently is, like so:

09-25-2026, 01-07-50.png (14.32 KiB) Viewed 230 times

I don't understand why it's not possible. Why am I able to align the grid like I want in one direction but not the other? Am I missing something? I don't suppose that's a bug?

I'm aware this is a minor inconvenience and the blueprint is almost-perfectly usable as-is, but with wube's commitment to QoL, I'm surprised to see this...

(Also, I imagine that's been asked before, I searched a bit but couldn't find anything really relevant, I have no idea what keywords to use for that, sorry)
(Also also, obviously, that blueprint is useless, it's a small scale example of the issue I saw while workshopping a 150x150 city block design)

[Loewchen]

You cannot offset rail by one tile, it is only placeable on a 2x2 grid.

[tottoko]

It seems the error message wasn't sufficient, as it didn't mention that grid lines containing railway lines can only be an even number.