Welcome aboard ashara76, I can't help you much with the F.P. junk - err, stuff - but there are some F.P. developers around here that might see this. I can, however, tell you a little of what's happening. I'm just going to pull out the non-F.P. stuff, the things that "make sense."
Let's look at a "normal" form and compare it with yours. This may seem like a long way around the fence, but it's all relevant as you will see.
<form method="post" action="anywhere.cgi">
<input type="submit" value="submit">
But what stops the submit button from submitting the form, hence doing it twice? The "return false" from this function tells the browser NOT to do it's natural action, submit the form.
So, now let's look at yours:
<FORM METHOD="POST" ACTION="../_derived/nortbots.htm" onSubmit="location.href='../_derived/nortbots.htm';return false;">
So whatever is going on, this form will never submit. The form action is irrelevant because the return false says "no, don't submit the form, do what I tell you in the onSubmit handler." It will just redirect to "../derived/norbots.htm" and none of the values will be passed to whatever "norbots.htm" is - and being a static page, it wouldn't do anything with it anyway.
I'd say, in the absence of any other info, this mess might have something to do with this:
in which case Front Page Extensions are doing something to automate the form processing. That I can't help you with.
Edit: Hah. Do a G search for notbots.htm, this is something that's "out there" with F.P.