It seems to be unusual but assuming that it is not an error ( With PBEC how naive to assume this... ) my guess is that, 2 events could have happened simultaneously. While you emailed your intention for conversion your job order already might be put on AJB and processed almost till the end.. So formally they might have put an hold your file. Then at the time of updating they updated to RIR and when in reality when they might have taken your file for real processing they might have realized that for this guy TR process was almost reached to the end conclusion so they might have decided revert you back to TR.. IF my assumption is right then you should see your 'Certification' within couple of days and if this was an error then pry to God and your lawyer...
bharatpremi, you are the man!. The status changed to Certified today. I'm keeping my fingers crossed until I get the documents. But I think for people in the same boat as I am(status changed from TR to RIR and back to TR), they can expect to get their outcome soon...thanks and good luck!