Can someone please explain why "puttet" doesn't work resp isn't accepted here?
"Stillet" instead of "sat" works fine aswell
Why not "lagt" instead of "sat"?
Lagt is used for something not in motion. Sat is used to describe a motion. The plates was moved, there for sat. If the plates vas already on the table then lagt was right.
What is the difference between 'tallerknerne' and 'tallerkenerne'?
Nothing, the versions with "tallerkner/tallerknerne" are unofficially also a way to spell it.
It matches how we say it better than "tallerkener/tallerkenerne"