You created a batch A/B test with a sample size of 100%. Even though all the leads should have been sent the test email, some leads still receive the winner.
Email Batch Programs are built in such a way that the test is sent with an background 'exploration' Smart Campaign, and the winner is sent with a background 'exploitation' campaign. The exploitation campaign will send the "winner" email to the following Smart List:
There are two situation where the exploration campaign may not send to all the leads in the program, even when the sample size for the test is 100%.
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