I ain't no doc or expert, but it doesn't sound as though you're learning to use your third balance system (proprioception), which is what makes all the difference. Ever since the forest fire here, I've occasionally gotten so busy providing meals for those who lost everything and are working on clearing their lots so they can move back onto their own land, that I slack off on exercises...and really pay for it! Cooking for dozens of people, sometimes over a hundred, is all new, and it's made more "interesting" because the so-called mobile kitchen has no electricity or water and is seven miles from my house, which has a totally inadequate little kitchen for this kind of serious cooking. At any rate, the exercises you specifically mentioned, like leg lifts, are not really for balance, so I'm concerned that you're not being shown how to do exercises to increase your ability to balance...without using your eyes at all.