Cheers for the advice guys

Kite- 11m Waroo 2010
Board- 135x40 Armada 2010
Ballast

89kg
I'm pretty sure it must be just down to my time putting it all in to practice in the lighter winds.
I don't have the same trouble with higher wind speeds, apart from the obvious problems being a relative noob

I understand the apparent wind and picked up the good word on here before about the correct sheeting on the down and upstrokes; have found that really helpful to know and have put it to good practice.
Though I'm sure on the downstroke it helps me more to sheet out and sheet in on the upstroke?
I found when I was practicing my water starts, sheeting in too much on the down stroke choked all the power out of the kite and sheeting in on the upstroke gave more power than sheeting out on the upstroke.
I use the same technique if I want to boost the speed running on a tack.
Is it different for lighter winds?
It's the lighter winds that is causing me the grief, so I guess experience will set me right.
I didn't have a problem water starting yesterday, but keeping the speed up was a struggle, so it's obviously about my technique needing work.
Just wanted to check if there could be something else about the kite.
Launching the kite, it was a bit of an effort to get it up to 12 o'clock and keep it there, even though I had the kite fully powered via the trim straps, I could pull the bar in to the chicken loop and wasn't about to get lifted.
I know not to sheet in the kite too much, another good tip from here, but I had to sheet in a certain amount, lest the kite started wanting to fly right up to the edge of the window at 12, then slip backwards untill it caught enough wind to stop it falling back more.
So it wasn't just the troubles on the water- which is definitely my lack of light wind practice, but standing on the beach with it was a struggle to keep it up too, which is why I was questioning how the 10s were going nicley, but my larger 11 wasn't, in theory it should need less wind to stay up, right?
I did try depowering with the trim straps on the beach, but it made it harder to keep the kite in the sky.
P.S.- I appreciate the advice, don't take my long winded explainations as me trying to say I know everything, I clearly don't, just trying to convey my understanding of what I'm doing & why so you can tell if I'm incorrect or not.
Keep the good advice coming guys

P.P.S- I prefer a nice spicy shiraz personally