Why is the order different from the order string?

[Pi-C]

I've some problems regarding order strings for technologies. Everything is in the correct order in vanilla (ammo, fuel, repair):

vanilla.png (84.75 KiB) Viewed 668 times

For some reason, the tech for repair sensors is placed between ammo and fuel when Nullius is used:

nullius.png (86.41 KiB) Viewed 668 times

The order strings of corresponding techs are the same. Why is the order in which the techs are displayed different?

[Rseding91]

As far as I understand the order technologies are show in the graph has nothing to do with the order strings. They are placed into the graph by prerequisite and dependency, and then it tries to minimize line crossings.

So my guess is: the technology has different prerequisites or dependencies with the mod and so it gets moved to reduce line crossings.

Or, I could be completely wrong. What I do know is order isn't used anywhere in laying out technologies in the graph except that they are arranged in some initial order before they enter the graph logic.

[Pi-C]

So my guess is: the technology has different prerequisites or dependencies with the mod and so it gets moved to reduce line crossings.

That would make sense because Nullius has a completely different tech tree. Thanks for the info, I think I can ignore this issue now.