Lately, when booking trips at delta.com, if I go partway through the process, and then click the Start Over button to change dates, times, price/schedule, etc. the booking engine keeps the dates that I had entered, but puts back in my default preferred trip city pair. Although my default trip is currently TPA-LAX, when I'm trying to book TPA-PDX, I don't want the website to unexpectedly switch me to LAX.