As stated your circuit has several problems. The op-amp (lower right) is operating without any feedback, so it is basically a comparitor. You will for sure oscillate in this configuration. You are also feeding the output of that op-amp directly into the base of Q1. This is another high gain configuration. Lastly you have the op amp, lower left, feeding SET but also it can be clamped by Q1. In the right conditions Q1 can effectively short the op-amps output to ground. No an advisable way of operating. You can simply add a resistor to the output of the op-amp to limit the current to a safe, recommended value.
On the other op-amp, a resistor from the op-amp to the transistor base will tame the gain in that connection. The op-amp itself need to be operated in a linear manner, so defining a known gain is needed. Also you will likely need some compensation in that stage. Phase addition of the various stages and the high gains you have will almost guarantee oscillation. You actually will be better off using a slower op-amp instead of the 1215. Compensation will still be needed in all likelihood.
Lastly I did not look up the specs, but you are powering the op-amps from 15 volts. This will likely limit the op-amps input to a 15 volt max value. If the output of the regulator gets close to 15 volts (current source, light load) the circuit function will become unpredictable.
paul