Was your latest A1C from a lab or an at-home test? If lab, then check your meter. If at-home, either or both could be wonky.

Meters should be checked against a lab draw (i.e. you do a finger poke test at the same time that blood is being drawn at a doctor's office or lab). I went through three glucometers in the hospital before we found one that worked consistently enough that both I and the doctors were comfortable with me taking it home. (Note: I have T1D, so I rely on a meter to determine how much insulin I need to give myself. For those who aren't insulin dependent, the accuracy/consistency isn't as critical.)