Configurable list widget: Hitting the remove button does not delete the data and it is showing up in the Email

Hitting the remove button does not delete the data contained and this is then shown / pulled through in to the email report.

I assume that you are referring to this form: https://www.jotform.com/72484546786371 base on your last edit. I cloned it to test it on my end but I wasn't able to replicate the issue.

First, I tried to add data to the Configurable list widget and deleted some data rows after, so that only one data row will remain.

When I checked the email submission, it shows that only one data row remains.

If you mean something else, please provide us more info and do get back to us.