i've mostly stayed with webstores i know, but sometimes when you place an order, the fabrics you choose are meant to co-ordinate. if they run out of one, they will automatically send the other, even if you don't want it by itself. it's always best to make that clear in the comment box or by email or phone.
also, always ask if this is the end-of-bolt. if it is, you can often get it for less. if you buy a lot (over $50 - $100 depending on the store) they will drop the shipping charges. if they don't advertise that, ask. they mostly will.
they are almost all friendly and cooperative and helpful. if you find one that isn't, lose them. there are too many others that are wonderful.