Without seeing your token and records, I am not sure why it would be pulling in an old account owner. If you want to share screen shots, etc maybe we can help out a bit more.
We use nurture programs with landing pages that are not Marketo landing pages, but webpages directly on our website. Let me know what you need more information on.
You could send in a smart campaign using a random sample going to a percentage say 10% a, 10% b, then pick your winner and send out the email to everyone who hasn't receive it.Or s...
You should be able to use the email performance report for this. You can pick sent date to be 2017 in the set up. You can pick all emails in the filters so it brings them all in. F...