No worries, Jason. I've found when building amps, even the markings on components are incorrect, most often the factory foil hash on a capacitor. I always confirm and mark the foil with a sharpie marker, and it's wrong about a third of the time. I would agree the resistor color code is most likely correct, taking the batch tolerance into consideration (it could be more than 20%). I have a batch of 100K carbon comp resistors that test between 72-85K. OLD! And you'd expect them to become more resistive over time, not less. An 8K8 resistor to ground on a tap sounds like it would function as a boost! But the only thing that matters if whether it sounds good, and if you like it, rock on, brother!