MVC :: ModelValidationResult.Message Should Show At Top And By Field?

I have a custom model validator on a particular property. It shows the error at the top (in the Html.EnableClientValidation section). However, it does not show the message next to the field, even though I have a corresponding ValidationMessageFor call that does successfully show the DataAnnotation violations associated with the property. Are messages returned through ModelValidator.Validate supposed to show buy the field like the DataAnnotation messages do?

If so, is it a problem in that my container actually has a list of these objects that i'm validating? (And somehow we are missing the prefix in ModelValidationResult.MemberName?) I had that theory, but hardcoding the correct name like this example did not make it better:

return new[]{ new ModelValidationResult
{
MemberName = "Fields[3]." + meta.PropertyName,
Message = "Invalid Date Format or Range"
}};