Maybe ignorance is bliss, we just deployed http://www.autumnriderstees.com/, a rails app to sell biker t-shirts, and we use the payment gem, we don't setup the sequence or timestamp specifically. The orders get through and appears in the Authorize.net account without a problem. We get a confirmation authorization code back. In other words, it just works. I can look deeper into it if you want.
by daniel — Oct 21