They are just starting to assign VINs for orders placed the second week of April, and there are plenty of Reds. I placed my order April 7th and just got a VIN this weekend. There's nothing odd here. The only odd thing is that they haven't made any Sport wheel cars in a while, but they were blowing them out in the middle of April, so they are probably just balancing the much bigger backlog on Aeros.
For your exact config, all cars up to April 10th have VIN's, and none after that. They quoted 3-6 weeks, and you're two weeks in. It's hard to wait, but nothing funny is up. You should get your VIN later this week or early next.