In the log for Secret Passage it always say's "Top Deck" even if the return card goes elsewhere.
Game #9701090 on frankfurt, my turn turn 14 I put a card in the third from the top. In turn turn 17 where I put a card on bottom.
In both cases the log showed "top decked"
Not having looked at all the past rulings I'm not sure if it would be better for the log to say "position x" or "returns a card to their deck"