Getting a TN Visa after employment start date on letter

Hi fellow Canucks, I'm new to the forum.

I am going down to get my TN visa on Friday June 4. On the actual letter that my company provided me, it stated the employment start date as June 1. Things have changed since the letter was sent to me and it wasn't updated. Would this be a problem when I apply for my TN visa?

Shouldn't be a problem.

You will likely only gete a TN until May 31, 2013, so you've lost a few days (so what).

Anothe reason why a TN letter should be dated, but not have a start date.