"He is a bad man."

Translation: वह एक बुरा आदमी है।

[paul.ens]

I gave the above answer and was marked as incorrect. The answer without the ek was given to me as the correct answer.

[GajarHalwa]

I don't know why but I put the right thing in, but the correct answer was "he is a bad man, he is a bad man". What?? I think Duolingo glitched, but nevertheless, I lost a heart. Please fix this >:(