Wrong puzzle in the site? - Mate in 2

I was solving mate in 2 themes in chess puzzles, but I came across this puzzle which I of course found the mate in 2 line but it is not a forced line, so I was struggling to find a forced mate in 2 line, I wasn't convinced by any other first move other than Ng6+ which is the only check in the position, but after Rook takes g6 or even fxg6 as you can see below, there's no mate in 2. 

Here is the link for the puzzle

https://www.chess.com/puzzles/problem/650814

Most puzzles have themes that were crowd sourced by members. So, while there isn't a forced nate in 2, the actual puzzle is a mate in 2. It is however is a forced mating puzzle and the initial move is the same no matter what.

It is strange, I could waste a lot of time if the puzzle was more complicated, I don't think it is a good experience to solve puzzles that are not forced.

As Martin observed the puzzle is a forced mate - only not in 2 but in 5 moves. 

Note that the world of chess.com is not a scientific world. "Mate in 3" is not always "mate in 3", "forced mates" are not always "forced mates", "correct moves" are not always "correct moves". In the world of composition chess a mate in 2 actually guarantees mate in 2 but chess.com puzzles are judged by lower standards. It is wise to ignore all keywords and simply play the "best" moves you can find while remaining alert to checkmate opportunities. That shouldn't be hard for game players since the game positions on your chessboard are not accompanied by keywords either

It's okay, there is the theme of mate in 2 in that position, from my experience solving mate in 2 and mate in 3 from books, I thought chess.com had the same approach to chosing examples which is being exactly what the puzzle is said to be.

If you tell any player to find "mate in 3" they will try to answer that specific question, so if you give a mate in 5 puzzle they could answer "There isn't" or "I can't find it".