There's a glitch in your platform that if you are viewing a specific contact list and hit the Add Contacts button at the top of the Contacts page, and select upload from a file, and then it preselects the list you were looking at to load the new file into, however if you uncheck that list and select another one, it ends up loading the contacts into both lists... triggering multiple emails to the same person at the same time if you have a campaign triggering off those lists to send immediately, which I do.
Hello @TuckR ,
I went through your account and couldn't find any sent campaigns, do you have any examples of contacts receiving multiple copies of the same email? Our system is supposed to be intuitive enough to only send one copy of a campaign to a contact, regardless of how many lists they're in that are being sent to.
With that said, we are aware that the current contacts system, when looking at a list, will try to force that contact into a list if you select any of the Add options. This is an issue that's been resolved in the new contacts beta, but I've gone ahead and tracked the known service request to this case since you are still on the original contact management system.