i suggest that if you are having trouble with your landings you should start by looking at your take off.

If you get a clen take off, edging hard, flying your kite back and timing your edge release with the kite lifting off the water. followed by smooth flying of the kite forward to remain at around 12 o'clock. And a smooth dive of the kite as you come in to land. You should find that you land most of your jumps cleanly.

I find that most, if not all, of the jumps that f#ck up, are a result of mis-timed takeoff. So long as you are diving the kite forward as you land that is.

my experience only so hope this helps.

You fly a Bow so, get back to some basics.

don't try for big jumps to start with.
just cruise along then bring kite to 12 O'clock and sheet in.

this should be enough to pop you up. Then steer the kite to the direction you are going and release some bar pressure.
as you land sheet in again to flair kite and cushion the touchdown.
then progressively pull harder on you front hand during each landing till it feels good.

When you have the kite control worked out jump size becomes a pop control thing.

Good positive vibes.......to be put above Galah thread.