It sounded like you cranked up the center shock initially...this gives you a teeter totter effect so that when you corner, the front of the skid pushes the outside ski up into the air. True on any sled with two shocks in the skid.
Tightening the limiter straps may solve the problem, and may be your only option. I'd like to tune the shocks first, then use the limiter straps for what they're for: Ski load. You use them to increase dynamic weight on the skis.
I have yet to go through the new skids, but the general practices apply. Depending on riding style, set it up for you, not Joe Average that Yamaha has to send it over with.
I'll describe my general set up, might help ya.
As much sit in as I can get without bottoming more than once a day on rough trails (this is different for each person, but if I bottom more than once, I know I need more preload)
Thislowers the center of gravity somewhat, and any little thing helps.
Tune the center shock for manueverability. I like a slight teeter totter on my sled with trailing arms, I can use the brakes, throttle, or handle bars to steer. Plus, when I jump on the throttle, the sled sits back and goes, and it helps in powder too. Too much though, and it gets unruly around corners.
Limiter straps: I like mine loose when the sled is sitting static on a flat floor. For your sled, who knows! Start stock, and adjust 1/4" of threads at a time, or 1 hole at a time, depending on what you have. Make sure you change only 1 thing at a time, and by small increments, and take notes!
Your ski shocks should carry the weight without bottoming, but any more and you're punishing yourself. So much and no more.
Have fun! I wish I was riding enough to be able to tune in a new sled
