Hey, I'm not sure what would be causing the delay. That would be an issue for Shapeways and not me personally since I only design and upload the models, not any of the actual 3D printing. From my experience, it takes at least a week or two for the models to be printed because they usually have to wait in line for printer space. After that they will ship them to you. If you have any other issues, Shapeways is more than happy to help and I have good experience with their customer support. Check out their contact page and I'm sure they will be happy to help out.
Short version: They have to make each part and they have limited printer space so it takes longer than just ordering a part that is already "in stock"
Hope that helps