usually with mixed cases they try to rid of inventory that is on its way to get spoiled and or not great and isn't selling.
I used to be involved in the wine industry years ago so i have some knowledge
I ordered mixed cases from kosherwine.com twice in 2020 and B'H, I did not find any of the wines to be skunky. They also are advertisers on DD and I am unaware of any complaints about their quality.
I've also ordered from onlinekosherwine.com (unrelated company as far as I know) and have also BH had a good experience...including ordering from their Overstock, Damaged Label & Closeouts section. These bottles were also BH very good, although I have not opened all of them yet.
Have you had a bad experience with either seller?