Thank you very much, I looked.
This is not a bug, but a feature :) It's a joke.
In fact, this is not a bug, but an implementation feature. Just ignore this information on the right. And then I'll see if I can hide it.
To see what's there and how to input and output, use the pillars.
A little about why. Factorio does not allow modders to create entities from scratch. Some existing entity is always taken and changed. In my case, you see a light bulb, but in fact it is an arithmetic combinator (this is necessary so that the dispatcher has two wire connection points).
Moreover, I can’t just send a signal to the wire connection point. To do this, a hidden constant combinator is created, which I can control, and is connected to this light bulb with both wires - green and red. And by connecting to the light bulb, you connect to the network with this combinator. I don’t know which wire you will connect to the light bulb, so there are both wires between the light bulb and the constant combinator.
From the point of view of the factorio, my light bulb is a combinator and a signal from a constant combinator gets to its input with both wires and the readings are doubled. Within the logic of the mod, I take this into account. But I cannot remove or change this information on the right.
I wrote with the help of Google translator, I hope for understanding.
Have a nice game!