To be clear, this was all tested extensively. I was included in that testing to a small degree and the release was pushed a number of times.
We even had a system working in the background, also tested extensively, that was supposed to automatically put a player into Advanced mode if their clubs were already setup in such a way (three wedges, etc).
Obviously many players were still put in normal mode automatically for some reason, and for some players their settings continues to be reset to normal mode for some reason after playing a coin game, and possibly other game modes. Currently I've only been able to reproduce the issue on a single account after playing a coin game.
We already have a bunch of fixes ready to go with our next mobile update which we currently have slated for next week. Obviously releases get changed, pushed, etc..