Can't say I agree with the above post. However I do agree that perhaps a new approach is needed, perhaps via a change in direction from your current therapist or via an assessment by another. I does sound like perhaps you are using the two legs differently, perhaps one more in the quads and the other more in the hamstrings and gluteals. I would stop squatting for now or get a squat coach to look at how you are squatting. You may in fact be building this movement dysfunction by squatting more that you should via using incorrect and compensatory techniques.

Always bear in mind your age. You are young. The body is capable of great healing itself and really this sounds like a training exercise going wrong. I do agree you could also have an x-ray or scan to remove any doubt of underlying skeletal anomaly. A manipulation in of itself is not likely to provide a long-term cure.