I am desparate for help on this one. I have a 7 year-old sound and healthy Paint who cannot go in a normal circle on the longe line or under saddle. He will make it about 2/3rds of the way around and then rubber neck and bulge out for the other 1/3rd. I have to tug on the longe line hard or use the outside leg hard to finally get him back on track after he has made 10 to 20 sideways steps. He is sometimes buldging toward the gate of the indoor or outdoor arena, but sometimes the buldge is just random. His steering under saddle is not great either. He can go in a straight line but will sometimes weave. It just seems like he wants to do his own thing and isn't really listening. We have done a ton of ground work and have a good relationship. I don't understand why he is doing this or how to start correcting it.