Why isn't my new welcome automation sending to new subscribers?

I have created a new automation to send a welcome email to new subscribers. I activated it yesterday and added in 60 new subscribers and the email has not sent. While troubleshooting this I found an old welcome email that apparently is active, but it is hidden in campaigns, not automations. My questions are:

1) Should I get rid of the older email altogether because its not running in the current place those things are organized?

2) how do I get my new automation to work?

3) Am I better off just updating the older email to look like the new one I am sending?

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