Hi Alan,
As Chris has said, it would help us if you obtain and post under your bio your PSA on diagnosis, along with Gleason score and staging. We will then have a better understanding of where you are and if you add to this from time to time we can more meaningfully comment within our limitations. Doing this will also provide you with a record of your progress.
The title of your thread is somewhat confusing when you mentioned 'Advanced' PSA result. With 'Advanced' we normally think of this as a measure of how far the cancer has progressed, ie 'locally advanced' or 'advanced' on it's own where in the latter case the cancer has spread outside the Prostate or the removed Prostate. I take it that by 'Advanced' you meant early PSA test. Just to clarify.
Sometimes a few cancer cells can remain after Prostatectomy, even microscopic ones. Did the surgeon say anything about clear margins? Where it appears that there are still some remaining cancer cells in the Prostate bed or close by, most likely evidenced by rising PSA, sometimes RT possibly with HT is often prescribed.