I couldn't find my old notes. So, glad you came up with your own! Since my DMX Operator is not in active production these days, it sits safe and secure in a rack, just waiting for me to bring it back to life.
(on the plus side, having an Elation SD+ interface, MyDMX interface and the DMX Operator, I can handle 3 lighting jobs at once!)
There are only 6 chases in the DMX operator. This is not like the scenes that are organized into 30 banks of 8 scenes each. There is just one set of 6 chases. Each chase can have I think 240 steps, using ANY scenes, and in any order of YOUR choosing(including re-using the same scene again and again if you want). But, here's the deal, you don't get total control. It will start at the beginning, then run through each steps based on either the sound to chase using the internal microphone, or else via timing using the fader settings, and/or a combination of both(chase to move between scenes, but a X-fade setting to determine how long to X-fade between scenes).
So, according to your description, where you claim you want control over the order the scenes run in within your chase program, the answer is most absolutely yes, it does in fact work that way.