PROBLEM SOLVED!!
I decided the problem must be an issue of the Explore Stars app and the iPad mini. So, this morning I took my Kindle Fire HD10, learned from YouTube how to install Google Play Store on it, installed Explore Stars, and repeated the test, but now with an Android tablet. It worked. Pointed south, the mount tracks from East to West, as it should. The only thing I had to do differently was enter my latitude (-33.7etc) and longitude (-70.7etc) manually, since for some reason the automatic GPS location finder did not work on the Kindle like it did on the iPad - where it did indeed enter my correct, southern hemisphere location data.
So, The EXOS100PMC apparently will work down here, but on an Android tablet. As soon as I get some decent images with its help I will post some here. Thanks again for all the suggestions.
manK
Thanks again for all your help. I can’t wait to do some imaging with this little rig.
Have a great day.