I bought these from Family Farm and Home. They were indoor and were in a package with no buds started. I planted them in Peat Moss and a mixture of sandy top soil. I do naturally have heavy clay soil. I dug a big hole and filled it with the above mentioned materials. Something must have been done right in order for both to sprout buds and grow leaves... but then something went really wrong...

Sounds like they drown. Watering heavily every other day is too much. With no leaves they aren't using water. Once a week would be better unless they faced heavy competition from other plants. Only water when they soil dries out around the roots.

Also don't amend heavy soil. If it drains poorly plant on a mound. Peat moss in a clay hole is like sticking them in a bathtub and filling it with water.

Mound that's a good idea! So are the dead? or will they bud again?

They are probably dead.

That makes me sad. I live in Michigan any idea where I can get some stems this time of the season? I really want to get some started this summer/fall or is that not a good idea this time of season?

I would say "not so fast". I wrote off a couple of grapes a few years ago and never got around to either replanting or even removing the "corpses" . Today I found that each of them have short tendrils with two small leaves! This after years?! -Years of my seeing only dried brown ( dead) stems.
( seems I read something about our pioneers utilizing this dormancy-like nature of grapes to haul them over here and then cross country.....)
-Cheryl