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100% A/B Testing - Duplicate Emails Being Sent

Question asked by 30b23721c28eebf5fb2fd98138b2b7c5238d1b51 on Sep 7, 2016
Latest reply on Sep 8, 2016 by e6615dd679b5dd0c3e60c20085706f392a9af2cb

We have recently starting using A/B testing on date/time, subject line, from, etc. When testing the date/time I have been sending to 100% of the lead 50% in the morning and 50% at night. This email has a specific day of the week it needs to go out. We have noticed that someone (within our company) has been receiving the email multiple times to the same email address. We have checked and verified that the email is not in the system numerous times. Can anyone help me understand why this is happening? Is it because we are using 100% of the test sample size? Any ideas would be greatly appreciated.