I booked international travel through an online agency later last year. Doing so I saved over $800 versus booking directly with Delta. However the downside I now see is very limited seating options and all of them stink. I couldn't understand why my flight from ATL to CDG was so completely full giving me about 5 seats to choose from, all in the back center. Today while doing a fake booking I see there's only about 25% occupancy and lots of great EC options. Granted I know these seating charts aren't reliable, but at least I know the plane isn't near capacity. How can I go about switching my seats and paying for EC? Will Delta help me out as a Gold Member or will they laugh at me for booking through the online agent? Thanks for your help/suggestions.