1999 Mitsubishi Eclipse Replaced radiator, thermostat and h

While driving a couple of days ago, I noticed the strong smell of coolant as I pulled to a red-light. I noticed the temperature was running hot so I pulled over and got outside to see where the coolant was coming from. The leak (major) came from somewhere above the (passenger-side) tire. I took it to the mechanic where they replaced the radiator, hoses and thermostat. Two days later, there is still a leak coming from the same side of the car although not as bad. The car's therm read normal. After several minutes, I popped the hood and noticed a lot of liquid around the reservoir cap (top) and beneath it (assuming this is where the liquid dripped). The reservoir was well within the 'full' range.

Should I have them replace the reservoir as well even though it appears to be full? What else could be the problem here?