When you were diagnosed, was the 13.5 an HbA1c test? (the test that measures an average blood sugar over the previous 2 to 3 months)
On your review today, what was the HbA1c result?
If you don't know, then it is important you find out. You can ring your surgery and ask for print outs of both sets of tests.
I'm afraid we have too little information to help you, but it is most likely that you were a T2 diabetic but have now managed to bring this under control to reach the "at risk" range - although this does not mean you aren't still diabetic.