It also states that getting tattoos and eating shellfish is wrong and yet two members of Mike's band have tattoos and I highly doubt that none of them have ever partaken of seafood before. The fact that a Bible-believing Christian will speak out against homosexuality but then get tattoos when the commandment against such is on the same page as the one against homosexuality is vastly hypocritical, as are many Christians. Either admit there are some fallacies to the Old Testament, or abandon your faith, because what isn't Christian is picking and choosing which words to follow like picking which foods to eat at a buffet.
I swear I'm not picking on you, but my general issue with this line of thinking is that it assumes that all Christians don't think hard about their faith or the books (not book) that it's based on. Now, that very well may be slightly justified, because in recent years the members of the global church have shown themselves to be paranoid, sensationalistic, stubborn, and insensitive (personally, I blame capitalism).
However, I would venture a guess to say that for sure those guys know the verses you are mentioning. Now whether or not they have an interpretation and theology of the continuity throughout the Judeo-Christian texts that sufficiently explains the contradictions regarding those subjects is an issue. When asked, they very well may give you a superficial answer about Jesus or the New Covenant, etc. But the statement that they are picking or choosing I believe to be (generally) unfair.