Can we trust a peak if we accidentally switched between different boxes of sticks?

Hello!

My wife and I used the Clear Blue Monitor this month and accidetally drew from two seperate boxes of test sticks. Fertillity was low through day 19, high for day 20 and 21, and peak on day 22. Can these results be trusted even though we accidentally used two seperate boxes of test sticks? 

Thank you!

Josh