After checking the Geman rules, I noticed this:
German rules:
Limit the mist: You place a tile such that at least 1 misty side is placed next to a mist-free side. In this case, you must then add 1 ghost to one of your own meeples on the game board.
English rules:
Limit the mist: You place a tile with mist on it such that at least 1 misty side is placed next to an existing, mist-free tile. In this case, you must then add 1 ghost to one of your own meeples on the game board.
This means that the English rules are leaving out the case where you place a non-misty tile next to a misty edge and limit the mist. Too bad.
All in all, limiting the edge is both placing a misty edge next to a non-misty edge and vice versa, placing a non-misty edge next to a misty edge.
This means that:
1. ZMG added an extra constraint that is incorrect.
2. You must add a ghost to one of your meeples if you place the mist-free CFRR tile on top next to the starting tile:
I'm correcting WICA right away.
Thank you guys for spotting this issue in the English rules. And thanks to ZMG for giving us another opportunity to peruse the rules.