Good catch, Hemingray. While aluminum is technically allowed as a GEC, it can't get within 18" of the ground. Since it's supposed to run without splicing, how it attaches to the ground rod / ufer is anyone's guess.
You need to derate for bundling only if the 'bundle' is over two feet long. I don't think the bundles are long enough for that to be an issue.
As for the receptacle ... I think I see a neutral wire there ... it's just that most of it is out of view, behind the lip of the box.
