Ok bear with me on this as the sometime driving instructor in me needs a couple of questions answered:

First, how's your heel & toe down shifts. If you don't have this down or are a little rough you'll get the dreaded axle tramp...especially if your local track has a bit of wash boards on the entrance.

Next the gas shocks: are these adjustable and if so did you crank the rebound damping near full stiff..................the rear of the car may be jacking down on corner entry, so by mid corner it's riding nose high (think overloaded pick up truck) OR the shocks and springs are mismatched, the shock being woefully under damped and springs are just oscillating wildly (this would be the case over any bumpy stretch of track)

Finally the understeer (two part question) you mention a bit of toe out; How much toe and why. Did you dial this in because the car wouldn't turn mid corner? Was it set up this way or the recommended setting by someone? I ask this because it is common in front engine rear drive live axle cars for drivers to dial in more toe out to get the car to rotate mid corner, very often to compensate for abruptly letting of the brake pedal (nose pops up and unloads the car) vs. trail braking deep into the corner. Second part; coming off the hairpin are you oh so gently feeding in the throttle as in small bore cars like ours it's so easy to unload the front end by gassing it to early and to quickly.

Now what to do about it: first check all the mechanicals. are any bushes worn? are the springs momentarily binding?make sure both rear dampers are set up equally and not leaked oil or there charge? Are any bolts loose etc?

If all the mechanicals check out fine then it's back to you. Ask yourself at the exact moment the wheel hop what did you do. A quick way to find out if it's driver induced is to approach the corner as normal and just brake, no down shift, don't step on the clutch either............if it still does it try it with the clutch in, if clutch in solves then simply down shift and ease off the clutch just as you're easing of the brakes (had a students Mustang that need to be oh so gently coaxed this way).

As to the understeer ask the same question: when is the exact moment the understeer starts and exactly what input did you feed the car.

If the car is pogoing through long sweepers as well, check the rear dampers first.............the fronts being stiff in comparison to the rears will definitely cause understeer.

One other note be careful with the camber, to much negative will make it weavy as all get during threshold breaking.

Sorry to be so long winded but there are number of things that could cause this.

Tom