Could I also say Zofie se o nej stara
You can. The meaning of the sentence is changed though. Generally speaking, put the most emphasized thing at the end.
'Žofie se o něj STARÁ.' (as opposed to doing something else)
'Stará se o něj ŽOFIE.' (as opposed to someone else)
The sofware said "Correct !", but I have a X and the red color. I don't fight against a machine...
Something odd might be/might have been happening on the Duo system side. Yours is the second comment of this type that I've seen in just a few minutes. But there isn't anything that the course team can do to fix it, unfortunately.