Check the following:

1) Is your trap wire wrapped around the side stay?
2) Are the lengths of the adjusters different? I.e there is rope that is adjustable on all systems and the port and starboard side lengths may be different.
3) Are the actual wire lengths different?
4) Is the bungee getting buggered up somehow on the port side and pulling you forward?

I think you have other boats at your club no? Check those and mimic there setup if possible!

Regards,
Sam