In my experience as a foreigner speaking Czech in CZ, calling a girl přítelkyně was always assumed to mean girlfriend. I've never been in a context where this was interpreted as "friend".
If you are male among young women than yes. Note that even the English word "girlfriend" sometimes just means a female friend of another female person.
Certain sentences are deemed too hard for Level 1 (by the automatic Duolingo process, so we do not even know which ones). So there is fewer sentences to choose from so you may get more repetition.