Perhaps you were never on high enough of a dose for an adequate time to put PMR into remission before your taper was started. I was on 30 for a month before tapering at 5 per month to 10, then 1 per month to 5, and now on 1/2 per month until 0. I have been fortunate to not have ever had the apparent relapse experiences you are having. You might consider getting a second opinion from another qualified doc. Best of luck to you.