RE: Do I have a problem?
Hi, you need to rig both floats at the same angle.
I'd start by disconnecting that link between the air and water rudders. It is asymmetric and will always cause problems. The water rudder is best connected using a plastic snake from the servo, down the float attachments, and back to the water rudder. That way it does not stress the float and move it out of position.
I generally rig my floats with the top surface parallel to the tailplane, and that has always been pretty good. In the past I have tried varying the float angle up to plus or minus 5 degrees from that, but my conclusion was that having the float top, and planing bottom, parallel to the tail is optimum. If you make wing incidence too positive, then as the model starts to plane the nose of the floats is force down and you get directional instability.
Your total buoyancy looks OK to me.
I don't know ho rigid your mounting is, but I always recommend a tie bar or two between the floats to keep them parallel. If they can diverge while planing you get a sudden grab, and turn to one side.