Hi, my name is XXXXX XXXXX X'X a Honda expert. I'd be glad to help you with this problem.
From your description it sounds to me like the A/C system is undercharged. I would take it back to the dealer and have the system checked. When the system is undercharged the vents closer to the evaporator will be colder than the other vents. These Hondas generally don't have HVAC box door problems or anything but technically it could be something in the HVAC box too but I doubt that's the issue. Based on the fact it was charged recently I think it could have been undercharged originally OR it has a leak that the technician didn't catch when the work was done. These newer Hondas use less refrigerant and the nature of the refrigerant used (R134A) means it is very sensitive to charge amount. If it's charged a little more or less than it's suppose to it will not work as good. I would have it re-inspected at the dealer where the work was done previously. If it had dye installed before it should be easy to see if you have a leak OR if it's undercharged with a gauge set connected to the system. Hope that helps!
Thank you. I'll take this back to the dealer and now I know a possible cause and hope it's as simple as being undercharged.