I know I have read a few posts posts about jacks and the like, but I don't really follow them only because I feel like it's dangerous.
I know it's a buggar to level the area, but I also know it's the most important part of the build and I really hate to see that kind of improper modification promoted. When you go to jack those legs you are going to put a pressure on them that they were not designed to handle. They were designed to handle the waters in the pool when the pool is built to spec. I know you realize it's serious ~ so I was just explaining what could happen if you try and take a short cut ~ you're likely to make things much worse.
I also know when you go to level the area you do not want to build up / you want to take the high sides down to match the lowest level of virgin area. Virgin area is undisturbed and least likely to settle. Ideally you want that pool to be sitting in level on all virgin, undisturbed land. If you build areas up to level, when you fill the pool ~ the weight of the water will negate the areas you have built up as they are not strong enough to hold the load and once filled you will be back out of level with posts bending to try and support the load.
Water weighs a little over 8 pounds per gallon ~ when you get a pool going it's a lot more weight than I think people realize.
You really do need to drain, level the area, reset the pool and fill. Yes it "stinks" and most likely the very last thing you want to do, but you will thank us once you have done so and you can look at the pool and know it's safe. I can say emphatically it beats the alternative which is bound to happen.
If you and your family are unable to level the spot. Call around ~ landscapers, pool installers ~ get a competitive bid and it shouldn't be all that pricey as it doesn't sound like it's too far out now ~ it is far enough out though to cause the problems with the legs, that's why folks are encouraging you to re-level the area. There are posts on here showing the process I have seen them, there should also be some instructional videos on youtube that would give you some help with this. It's super important for everyone's safety you get this part of the build spot on. You might have people look and say it looks close enough to me, no worries, etc. But when things aren't build to spec ~ there is no integrity to the structure. Integrity to the structure is key to everything, in a nutshell that's why there is a spec.
Keep us posted please.