Difference in testing values?

Kayla • 12/30/16❤️ 1/20/18 💑 12/12/19💙

So I’m curious if anyone else has had this I have an accuv Aviva plus meter and yesterday my fasting was 97 and I tested again because it seemed high for me and the second drop was 86? Tested tonight after dinner and the same thing 121 vs 111? Is this normal? The dinner number was well within range (my max is 140) but I was curious if it would do it again. If there something wrong with the meter? I used the same prick just first vs second drop blood