So, in a duel, someone killed me and then my explosion killed the someone and then I won the duel. Maybe it is designed to be this way but it seems like at the least it should be tie.

yea, this must be a bug... never seen that happen before. Double KOs have always been recorded as a tie.

Hmm, did the other player issue on their own rockets just before your explosion appeared to kill them ?

Ecka

My memory fades now, but it could be.