Unique fails for email field

[yellowBirdy]

I'm getting multiple failed uniqueness tests for an email column, while there is only one duplicate.
Rows 3,4,5,6,8,9 get flagged instead of 8,9 only
Note: required and email validation work correctly

Data:

Email

neiles@domain.io
XXX
sasza@domain.io
@domain.io
bill@domain.io
jim+1@domain.io
jim+1@domain.io

Code:

const CSVConfig = {
	headers: [
    ...
		{ name: 'Email'              ,inputName: 'email', required: true, requiredError, unique: true, uniqueError, validate: isEmailValidStringent, validateError}.
		...
		]
}

[yellowBirdy]

I've had the same inputName for several columns, updating that fixed it