Since there arent any oil clearances/deals going on around me I thought I would replenish my oil filter stock using RA. I know from past experience that grouping the shipping warehouse can save on shipping. I had 3 or 4 different filters added to the cart which showed the warehouses. I attempted to change some of the brands in order to get them all coming form the same place only to see the warehouse change on all of them depending on what I added or deleted, I felt like I was trying to herd cats. Anyone have some advice ?