Maybe your plant is more sensitive than the others and is just starting to shut down for the winter? Noticing some of mine are turning yellow, drooping and starting to drop while others still have inflos and all their leaves...

Here is another close-up. This orange/yellow color is embedded in all the fissures and is like an overtone across big sections of the piece. Pretty bummed :(

Thanks so much Kevin! You're post pulled me off the ledge this morning. The granite guy came and stripped the sealer with an electric buffing tool (it had a round sponge at the end). Some spots he had to go over 2 - 3 times. And he's coming back tomorrow. There's a spot that I still think looks like a dark streak but he says that where the quartzite is showing (?). Then he tried to convince me it was a shadow. I kept asking him to go over spots and he'd say, "You're seeing something dark, where? I don't see it" and his helper would put his hand on the exact spot I was questioning. This happened like 3 times. Kind of frustrating though I'm glad he came back--I know others on this site have gotten stood up. There are two slabs. The smaller had no issues and looked great. Like I said they both got a color enhancer and 3 coats of sealer. He's due to come tomorrow and I was going to just have him put the color enhancer on the stripped counter and I'll handle the rest with Method but he told my husband that the color enhancer is what caused the problem not the sealer which is a load of ... to me. I'm going to have to bring up the dark bands again in the morning to have him rebuff those. I hate to be a broken record about it but it's nuts to me to have a problem with the counters from day 1 that I didn't even cause but paid full price for. Unfortunately, DH is too tired with the process so I'm fighting this fight alone. Many, MANY thanks for answering the call this morning!

Did they use latex caulk? Part of the problem or all of it may be because they smeared it on which is giving grime a larger area collect on and more grooves to sit in. Typically I use Quad OSI and I lay down a bead without tooling it. I don’t use any caulk where the casing meets the sill and there should only be a small caulk joint where the window meets the sill. They are either incompetent, hiding mistakes or both. The best would be to remove and reapply, but as you were told it isnt easy and the aluminum could get damaged. I’d try some cleaners on it that are safe for paint.