Does BS have a different delay when in a macro?

Someone on Basil posted that he put B-Step in a macro on its own (so just 1 cast of BS in the macro) because it shortens the delay between BS and another different skill, such as Assaulter.

Is this true? I've tried it out and I honestly can't tell if there's a difference.

Also, does anyone know why BS keeps casting itself? I just tap the macro and BS casts as usual, then even without me tapping, it casts again automatically. I've only got one BS on the macro.

do you hold the key down? or press it

because if you're holding it down, it registers as you pressing the macro twice

do you hold the key down? or press it

because if you're holding it down, it registers as you pressing the macro twice

I press it, but I guess I might be pressing it for too long.