The A1C is so varied depending on what time of the month you do it etc. so it is that exact. I wouldn’t freak out too much with that number. We had several threads on this and too many people freak about about a few decimals. You should be going by your testing numbers more. The A1C can often be inaccurate average of your TRUE results. It isn’t perfect - just like our meters aren’t perfect.
I had my A1C tested today - 5.1 from 5.6. I totally expected it to be in the sixes because I have been eating more and i know I had some higher numbers than last time so I was surprised. That said, my TRUE A1C may be higher than this - it depends on how those cells die off. Put it off by a week and you could get a number difference of several decimals points.