Oh, I thought the question was related to Bubble, not zapier…you might want to post this in Zapier forum as well since it looks like your issue is related to how you setup a Zap in Zapier rather than how you setup workflows in Bubble
But, from my complete lack of understanding of how Zapier works, I do believe from the screen shot you provided you have told the Zap to create a thing in Bubble and the next step in the Zap is to create a thing in Bubble, so you seem to have told it to create a thing twice in Bubble.
Are you sure you don’t have two zaps that are doing the same thing without realising? It sounds like you have another zap with the same trigger but haven’t configured the create thing in Bubble action completely so it doesn’t add the data.