the float function not staying lock in can be cause by fluid building up in the two inch long block
on the rear of valve bank for the joystick.
just remove it, and clean out the fliud in it.and your float lock will work again.
I need to do this 3-4 times a year on my 2310tlb, 2005 model.
I think there was a post about this 3 years ago when I was having the same problem
I put new seals in valve bank ,but it would still pass fluid over time, and your float lock would start
to kick off too easily , that's the time you would clean it out again.
the 2410 has the joystick valve bank under the rear fender, don't know if its still a problem or not.