OK, I resolved registering my SparkLE (done & done), and I got the tempo knob to work by choosing the proper clock function option, but the SparkLE is still not showing up as an option to control the iSpark software, though it appears to work just fine (now that the clock issue was resolved, by me, on accident, just by trying a little bit of everything).
Once it is connected to the iPad, and iSpark is opened, is the SparkLE supposed to show up as an option in the midi connect drop down menu? The MiniLab mk II shows up this way in the iSem app I have.