I think the online instructions are slightly misleading. There are two ways that the above answers, as well as the two answers ending in Q, can be entered into the grid.
Special instructions: Clues are in alphabetical order of the last letter of their solutions, which should be fitted in the grid, jigsaw-wise. Since it is symmetrical, this could be in two ways. However, two clues indicate which is correct.
I still don't understand.