I mean that you have:
Your sentence "However, your deriving of "email" from "Email" is one of our suggestions to overcome a little annoyance with fmbadhandler." is confusing and I'm not sure what you mean or how it applies here.
I guess you got that from our documentation.
<input type="hidden" name="derive_fields"
That's required when you're using FMBadHandler.
But, it means that you're collecting an email address in the "Email" field, which is not a special field.
So, I assumed (incorrectly) that the problem is with the Contact Email part of your form (the Email field).
I've just looked at your form again, and now realize the problem is with these fields:To solve this problem, we'll have to enhance the junk detection feature along the lines I mentioned in my last post.