Rule Machine variables possible bug?

In Rule Machine I had setup a rule to set a variable based on a sensor value. When I'm given a list of devices to get the humidity from it also shows global variables but why would those show when I said sensor? There is another option to set a variable to another variable.

The Guest_Bath_Humidity and Master_Bath_Humidity are global variables not sensors. Or do they show since they are set from a sensor? If that's the case though why have the option to choose Variable from the drop down?

You must have created humidity Connectors for those variables.

Guilty. So that's expected then. Okay good to know it just seemed out of place since a variable isn't a sensor and there is an option if I wanted to use a variable to set another. But if it's not a bug that's all good.