I'm running the email link performance report to try to see which links in an email are more effective. But I can't figure out what the difference is between clicks and leads. I don't see why those numbers would be different. For instance, someone has to be a lead in order for me to send the email to them, so why would I have 46 clicks but only 40 of them being leads? Does that mean that 6 of these were people clicking the link multiple times?