Dookz You are ovepowering your kite!. The fuels do not like to fly like this and if they are flown like this in light winds , they do all kinds of weird things.

Set the lines even and make sure the bladders are pumped up real hard.

Try attaching the front lines to just the 1st knot (furthest from the kite) & the rear lines the same (on the first knot, furthest from the kite) You want the lines to be attached to the kite as even as possible.

Then launch the kite, while it's in the air you need to now adjust your trim loop & stopper ball settings. What i do is...
Have the kite fairly depowered using the trim loop depower strap. (but not fully depowered, say 3/4 depowered)
Then keep the kite flying between 11 & 1 o'clock so that it doesn't fly over my head and fall out of the sky. (its depowered so you should not get pulled or lofted unless its too windy/gusty, but go into the water to be safe)
Loosen the top stopper ball, then pull down the bar until you see that the back lines have minimal, but just a little bit of slack in them. move the stopper ball down to where your holding the bar and tighten it up. This will give you less movement (power/depower) when your holding onto the bar. So now your more relying on the trim loop power/depower strap to depower or power up the kite. Hop on your board & power it up using the trim loop by letting it all the way out. Go for a run & see how you go....

If you need less power when your going along then you just pull on the depower strap till you find the right setting.

When you need a lot more or less power then the above you can adjust the stopper ball setting again. Or, bring the kite down & adjust the pigtail settings on the kite where the lines are attached so you have the back lines a bit shorter or longer. If you need to adjust the pigtail settings you genarally dont get much more power/depower & you normally need to go up or down in kite size for the conditions that your out in.

The stronger the wind is the less you will need to bring down the stopper ball so you have more depower available. The lighter the wind the more you need to power it up. But don't over power it too much or the kite will be sheeted out and it will fly backwards and do all the weird things you've already experienced. Try flying the kite more aggressively instead.

Always depower and undo your stopper ball when you come in to land the kite so that you minimise the risk of being dragged or lofted by the kite.
Hope that helps

Yes, from what you guys have been telling me, I realy should be having straighter lines than what i am getting. It must be because of the light conditions i've taken it out in so far.
It was becoming plain rediculous at one stage; 1st knot front lines, 3rd knot back lines, trim loop on full power, bar pulled all the way back, and still swaying like a bitch... It's a brand new kite, and i haven't changed any of the factory settings on the bar/lines etc, so i guess it must be none other than the conditions. Alright well i'll give an update on this after this coming weekend, should be some higher winds in store.
Thanks for all your help, i'm slightly less confused now

The kite will turn the at the same speed but the bar pressure will be different. This means when its depowered you will have to pull more on the bar to turn it. When powered up you will have to pull less.

Yeah kk if the kite is way over sheeted or fully flared you will loose performance, infact the kite will fly really bad. But if its tuned correctly when powered right up the kite will still turn as fast as when its depowered. However when its depowered you just need to pull harder on the bar to take up the slack in the back lines.

Dookz... Are you using the outermost pigtails?

I am using outermost pigtails (number 1 and Z)
Currently setting the knots even...

I've placed the lowest stopper ball as far as i can down, and the top stopper ball about 5cm down from depower cleat.

I think i will need to give it to another SS fuel rider for him to give me an impression

05' Slingshot Fuel rider