That's the first I've ever heard of eggs being classified with dairy. I grew up with the eggs being placed with the meat and beans group. I'm looking at my nutrition textbook right now; this is what the new 'MyPyramid' looks like:

The meat group (purple) has been renamed "Meat and Beans" in the book, but online it's also labeled as the "Protein Group". They still stick the eggs with the "proteins". What's interesting is that the diagrams of other countries' food guidance charts also list eggs with the meats. In every one of them, the dairy and meat sections are next to each other too.