Inauthentic form submissions from "known" visitors?

I don't know if this is really a threat but I wondered if it's a possibility before I get too excited about my campaign results. I employed this form pre-fill tactic on one of my forms on my site: https://blog.teknkl.com/pre-fill-any-site-any-form/ 

It seems to work beautifully. 

I executed an email campaign today that drove people to that site. I noticed our conversion rate from the email web page visits to form completions is over 60%, which is *really* good for us, so I was excited to report it. But while thumbing through the form submissions,  I did notice 2 people from the same company who seemingly filled in the form at the exact same time under the exact same IP address. It made me wonder if it could be a bot form submission? Has anyone else ever seen that? I know bot clicks in emails is super common for us, to the extent that I don't even like to look at click rates in emails anymore, and Marketo support told me to rely on "visited web page" to track email clicks instead, but I can definitely see there's some fishy web page visits that look like probably email server clicks too. But for a form submission, I didn't think bot clicks would really exist, but now I'm not so sure. Is it a threat or is that a fluke? Is there a way for me to tell for sure? Has anyone had any experience with this?