You did get a mislabeled grape because seedless concord dont ripen the entire cluster at once like that. Those are beautiful looking grape clusters. Seedless concord ripen a grape here and there , half are green when the others are ripe in the same cluster. I would use those for jelly since they are sour they will be perfect for that. The real concord are not ripening yet. Once in awhile soil can give grapes an off flavor for the first few years. With grapes flavor can be about where they are grown rather than what they are. That is not the case with those the timing and growth does not match up. An easy way to identify concord and its children is the under side of the leaf is whitish or tan. Lambrusca type grapes have that charecteristic always. They are used for juice and jelly but make terrible wine if they look like that. Not everyone shares the same opinion on wines. Here is a reputable source to get concord. If you want to do a bulk order maybe other Kansas people will as well because look at that price drop to $2.50 a vine. I would be willing to go in on some with you.
My guess is that is a child of concord and there are many of them. If you want to root some i can give you some branches to start of seedless concord. The same goes for concord. For $2.50 each + shipping its not worth it to root your own hardly.
Take a look at my old thread then look at the clusters and vines again. Seedless concord are picked one grape at a time. Seeded concord are picked in clusters. Concord seedless like concord should be renamed reliable!
Note the underside of the leaves in the photo.