may i know where you are from and who did the treatment?
I personally never needed more than three sessions to achieve a long lasting result unless there are other causes than misalignments.
The correct Dorn Method must include explanations on the cause of the problem for the patient to be informed what to avoid only then there can be long term results. But that is not enough, after applying the Dorn Therapy the patient needs to be given minimum four basic self help exercises (see my website) that stabilze the corrected joint position. These needs to be done at least for two month several times daily to give our body time to adjust and stay pain free.
you may safely try them and see the result.
If you have more questions or need tips or clues on how to ged rid of problems you're welcome to e-mail me.