I suggest to all MyDMX users to play with the Editor a bit.
Even so, a single channel with multiple functions can be a bit "intimidating" at first. Fortunately, when you get into the editor, you'll see it will allow for ranges for specific functions. It's not the most intuitive interface, but it's at the same time not terribly difficult to learn if you take your time and choose to not try to rush through it.
Of course, I can't stress this enough, do test it as soon as you can. For me, it's not so easy since I got stuff in the truck preventing me from having easy access to my lights, but I do what I can when I can.