Okay.
I don’t understand the point of the first two steps in the workflow?
From what I can see, you are looping through the first 10 rows in your Leads table, and adding a new row for each one?
Wouldn’t you only want to add one row, for the incoming email?
In which case, you shouldn’t need the loop.
My guess is that you currently have 6 rows in your Leads table, which is why you get 6 emails.
I’d just get rid of the Loop, and that will probably fix it.