Due to the weather in the Northeast I may be forced to cancell a barbeque. I think I know the answer here but you cannot re - freeze ribs if they were frozen once. They are from cosco in the cryovac seal.
You are correct. You should never re-freeze meats.
However, are you sure the ribs you got were frozen before your purchse? Sam's ribs are fresh when they get them and they most likely are buying from the same processor.
When I bought them they were not frozen but I put them in the freezer when I got home. As far as problems go this is not a biggy, I will just have to smoke em & eat em!