0% less means equal. It should say equal. How would it be if at work, you would be called into the HR department once per week to renew your contract - and each time it would say your salary has increased by 0% ?
thats not the same thing. we both know close fights come to luck. from what ive seen 0% usually favors the attacker but sometimes it wont. just sheer luck. if it were equal no one would win or lose. i will add though that there should be a new stat added "draws"
Perhaps an issue with rounding? How many decimal places are usually shown? I do know that there is an element of randomness, so if you attack the same player and neither of you get/lose any boosts or weapons/warriors, sometimes you can win AND lose.
I think that this might be rounding. Did you win or lose? can you send in a screen shot to support so that we can investigate further?
I've never seen a 0%, but always thought of what would happen in case it did, my closest fight was a 0,01%. In this case, the attacker lost as it says "0% less than your Enemies...".