Again, being picky about word order seems inappropriate: 最近我们不错 should also be okay
I see your point, just really odd structure. You can report your answer. Duolingo staff just started Chinese module and are working hard. So help them out.
Which one are you saying has the odd structure? Duolingo's or youcanchoo's?
The thing is, that both are grammatically right, so both should be accepted :)