Can someone explain why output atoms randomly appear as input in different places?

[Diepainful]

So, I make a reactor to break down N2 and O2 into N and O

Then my next reactor takes N and O and makes them into a complex N O combination(For the level No Thanks Necessary)

This shouldn't be hard, but the problem is the input for the reactor starting with N and O appears in 2 different spots, even though I specify the output on the last reactor in only 1 spot.

Maybe I'll try a rough picture
_____________
|__|__|__|__|
|__|_N|__|__|
|__|__|__|__|
|__|__|__|__|

This is what is says will be the input to the reactor

_____________
|__|__|__|__|
|__|_N|_N|__|
|__|__|__|__|
|__|__|__|__|

This is what actually happens, with a seemingly random chance for it to be either square. Is this normal? It happens at every level, but I don't remember it being explained

[imonfire]

The position of the outputs in the first reactor influences the position of the inputs in the second.

[Diepainful]

Yeah that's what I'm saying. The output on the first reactor looks like the first picture I posted. What's actually coming in on the input is the second picture.

*NOPE! I'm a giant idiot* I was dropping an N=N and -bonding it there on the output. Duhhh*

[Ladicuis]

Don't feel an idiot, we've all made worse mistakes.
Now you've just learned to watch what really happens in a reactor and blaming yourself first instead of the game