The person who booked an appointment doesn't receive an email about the booking. Instead employee is receiving both emails. What's this?

I have tried both by myself in logged-in status and from an incognito mode (logged-out status)—the same outcome.

Why can't you simply try booking an appointment using the form here at https://www.imimdesign.com/book-an-appointment/ 

I expect you'll not receive the confirmation mail which you should receive. In fact, the admin is receiving both emails. Even the one in which the person's name who booked the appointment is mentioned. Check the attached screenshots for example.

Even if you check the appointments page, here also the client's email and the employee/admin's email is showing the same even though I've booked the appointment using a different email address and from my phone where I am not logged in my site.

It's not working properly sir!

Admin is receiving both emails when I try it. That's what I have tried to show you in the video. It's not working for me. What might go wrong? Is there any customizer export feature in your plugin that I can just export the setup and send it to you?

I am not comfortable sharing the login access. I am sorry and thank you for your response.

I guess the problem with the plugin is when I use the same phone number (which means when an admin's/employee's phone number is used in the booking form). The admin mail receives both emails when I use my same phone number to book the appointment. You can also try my number +91 8001823387. Use any email but enter my number and you will not receive any email.

I tried using a different phone number and it's working. Kindly try this yourself and fix the plugin if such an issue occurs to you too. Thanks for your timely response and support. I really appreciate it. Have a good day sir!