"She sleeps at home."
Translation:Ea domi dormit.
You are right, here any word order is correct, because it's a simple sentence with no preposition or whatever.
If it was "classified as wrong", just report it (with the report button), and it will be added to the course. It's the way it works on Duolingo: they add alternative right answers from the reports, when some of them have been forgotten.
Yes. Both "Ea dormit domi" and "Ea domi dormit" are correct.
And even without the subject pronoun, it is correct: "Domi dormit", and "Dormit domi".
It is said that the word order in Latin is relatively free. It means that you can often change the word order at will (but: 1/ not always 2/ it changes the emphasis of words, so it is not inconsequential)
For very simple sentence, without prepositions, without adverbs, just with basic SVO, you can change it at will.
But remember the standard word order is SOV.
When you write a sentence and you know it should be accepted, please, use the report button.
You just explained the exact rule of placement for the adverbs.
Adverbs, like the negative particle "non", are used to modify the word coming right behind (usually).
Here are some examples of adverbs:
(Adverbs in italic, and verbs are bolded)
ancilla suaviter cantat. (The maid is sweetly singing)
leo Herculam ferociter petit. (The lion ferociously attacks Hercules)
senex novaculam intente spectat. (The old man intently looks at the razor)
Verbs don't have gender agreement. You're thinking of adjectives.
Here is a plain-English overview of what the cases are and how they work:
Latin cases, in English
Adjectives must agree in gender, number, and case with the nouns they modify, but they have their own declensions. Sometimes you get lucky and the adjective just happens to follow the same declension as the noun, but that is not a guarantee.