"The remains of seven individuals have been found at Dmanisi""
Looks like this article is out of date. They are claiming "To day we have recovered more than twenty hominid remains in Dmanisi. This includes three mandibles, three hominid skulls and several postcranial parts."
From this and other references, it would appear that they have found only one piece from below the neck, and that is a single foot bone. Unfortunately, most of the references are in other languages, and babelfish makes technical docs totally unreadable.
Judging from the other claims, they have three jaw bones, three upper skulls, one foot bone, and (twenty minus seven) at least 13 pieces of the back of the head. Not much there to make a claim of knuckle dragging.