You both are in agreeance of intentionally team-wounding/team-killing.
Tsubodai, you seem to be intentionally twisting the reality of the situation based on your original claim of "accidentally" hitting Phantasmal once to:
I will let that I was not trying to avoid hitting you while slashing at the enemy as you weren't doing anything anyway...
Tsubodai, it does appear you attacked Phantasmal three times, not once, intentionally. Perhaps there were only a few peasants left and you were flailing around the V, hitting Phantasmal carelessly trying to clear the area.
Phantasmal responded very quickly to the TW so I expect it really was just a quick alt-tab.
Phantasmal did clearly retaliate based on the chat log.
Since you both accept you were in the wrong and Phantasmal accepts a ban, I think that's fair enough for both of you. Not a week though. I won't take you up on that.
Issuing a 12 hour ban on Tsudobai and a 12 hour ban on Phantasmal, along with a stern warning to the both of you- Use QML if it's appropriate, take lots of screenshots. Bans are easily avoidable.