2005 Subaru Legacy Oil Change

I just came back from Firestone to get a wheel alignment done, when they recommended that I get my oil changed since the technician said that my oil looked "dirty". I had previously gotten my oil changed at the same Firestone 2 weeks prior. Since that oil change I have driven about 700-800 miles (mostly highway). I have about 65,000 miles on my car. Whenever I have checked my oil after an oil change it has looked more honey like in color, this time it it more brown than usual. I am suspicious as to whether or not the oil was actually changed 2 weeks ago. Is it possible for oil to look "dirty" two weeks after an oil change?