How much rotation did you have will also promote the problem
When i use to sail on my mates 5.7 we would pull the downhaul until your hand hurt, if you think you have enough it probably isn't
then when it got too much we would then slowly centre the rotation
When the wind was up (say 15+)the sail invert on the top 4 batterns and thats something that looks weird also
We always use to say that the boat would take us for a sail and a lot of the time that was the case, we use to sail it at around 170kgs.
hope this helps Richard