OK...thanks - I had not thought of that! It makes sense because you would have revealed information about the Hex that could impact your decision about whether to use the Tracker to top deck the card.
To me, it makes more sense if you think in these terms:
When two things happen to you at once, you pick the order. But having chosen one you must do it completely before doing any part of the other. You can't choose to start one, pause, do the other then go back and finish the first.
Thanks crj! That is very concise and easy to remember - and to explain it to other players. I have played so much Dominion that I should have recalled that, and it sounds pretty close to what Donald originally wrote.
So now I completely understand the way to play multiple effects, and their possible order! ; )
I was though still having a bit of trouble understanding the flow of play with Hexes that invoked the Lose Track rule, so I went back online and played quite a few games buying Cursed Villages with a Tracker in play, where I would always choose to receive the Hex first rather than the top deck option. At first I was a little confused that the same Hex (e.g. War) might sometimes allow the top decking afterwards, while other times it would lose track either because the Blessed Village was "covered up", or "moved". But as I carefully watched the deck and discard pile I realized that online play does something for us which we sometimes tend to skip over in play on the table. In online play, the gained card always goes first into the discard pile (unless otherwise stated on the card), and then Tracker expects to find it there on top of the discard pile if you choose to select the top deck option. On the table I'm afraid we had gotten sloppy and were often skipping that gain-to-the-discard-pile step, and were simply gaining the card directly to the top of our deck when Tracker was in play. Mostly that works because you don't have a 2nd effect happening at the same time, but in cases like Blessed Village it can cause real confusion. I know you know this - just sharing my thoughts with any other players who might struggle with this.
So in addition to your advice that you can choose the order of multiple effects happening at the same time, but have to completely resolve one effect before moving on to the next, I would add that for IRL games it is essential to remember that gained cards always go first to the discard pile unless otherwise stated - to avoid confusion with cards like Blessed Village. Thx again for setting me on the right course to sorting this out. Among my friends and family I'm the Dominion authority, and need to be able to explain rules like this clearly and concisely, so I appreciate the help!