You're right, those resistors should both be red-red-gold-gold, 2.2Ω. The one that's red-red-green-green doesn't look like the colour bands have changed; they look very even all the way round. My guess is that the wrong component was installed at the factory.
Those resistors, and the two capacitors at the ends of them, are a circuit called a "Zobel network" which helps keep the amplifier from becoming unstable. It's quite possible that it will work perfectly well without them, or with the wrong value components there. You should (eventually, at least) replace those resistors with new 2.2Ω 0.5 watt resistors.
OK, I'm a bit concerned by the fact that voltages seem to be changing every time you measure them. Here's an image showing the points to measure with your multimeter. Push the black meter probe into the solder at the black dot, and push the red meter probe into the solder at each of the red dots to measure the main positive and negative rail voltages.
But before you take any more measurements I think that board needs a cleanup. I also suspect that the brown goop on the top side may have corroded the link wires that connect the bridge rectifier to the electrolytics. So this is what I suggest.
- Desolder and remove the two main electrolytic capacitors.
- Use a flat blade screwdriver to scrape off all of the brown goop from those areas.
- As you're cleaning around the two wire links, push them to see whether they are still intact.
- You may need to desolder and lift one end of the red-red-green-green resistor, and one end of each bridge rectifier diode, to get at all the brown goop.
- Clean any remaining goop off the board surface and the component leads using cotton swabs and solvent. Isopropyl alcohol (tape head cleaner) is best, but methylated spirit will do.
- Clean the underside of the board the same way, especially the corroded area near the bridge rectifier.
- Replace the jumper wires if they were corroded
- Refit the electrolytics
Then you can measure the main positive and negative rail voltages at the points marked in the picture. Make those measurements with the transformer plugged in, but initially, nothing else.
...
