There are two confusing things in the interactive puzzle page.
If you try to solve a puzzle in the interactive display and play a wrong move you will get the red incorrect result. If you use the try again button, you are redirected to the beginning of the puzzle. So if in a longer sequence you play a wrong 12th move, you are redirected to move 1. Rather frustrating.
Another thing
If you use the move selector at the bottom to go back one or more move(s) and enter the correct solution, the display still shows the red incorrect result.
When I experienced this behaviour there, I thought “oh, this is on purpose, they’re making me read the whole thing first, instead of letting me try every final move until something works”.