Based on another question, why would an a1c test change in about four weeks?

I had an a1c test done on August 9th, the result was 6.1
For my employee health assessment had a test on 9/13. It was 6.4.

For the record over the last few years my results have been in the 5.9 to 6.1 range. One reading was taken at a physician’s office and the other was done at the local hospital where I work.

Isn’t this kind of a big swing in such a short period of time?

SRM